diff --git a/web/_tool/pubspec.lock b/web/_tool/pubspec.lock
index 02d6b32ee..be62d7e0f 100644
--- a/web/_tool/pubspec.lock
+++ b/web/_tool/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   args:
     dependency: transitive
diff --git a/web/charts/common/pubspec.lock b/web/charts/common/pubspec.lock
index cf3d823e5..106df7727 100644
--- a/web/charts/common/pubspec.lock
+++ b/web/charts/common/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   analyzer:
     dependency: transitive
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.36.3"
+    version: "0.36.4"
   args:
     dependency: transitive
     description:
@@ -70,7 +70,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.18"
+    version: "0.1.19"
   glob:
     dependency: transitive
     description:
@@ -140,7 +140,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.18"
+    version: "0.3.19"
   logging:
     dependency: "direct main"
     description:
@@ -373,4 +373,4 @@ packages:
     source: hosted
     version: "2.1.16"
 sdks:
-  dart: ">=2.2.0 <3.0.0"
+  dart: ">=2.2.2 <3.0.0"
diff --git a/web/charts/example/pubspec.lock b/web/charts/example/pubspec.lock
index ef0e60235..2f55964d1 100644
--- a/web/charts/example/pubspec.lock
+++ b/web/charts/example/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   analyzer:
     dependency: transitive
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.36.3"
+    version: "0.36.4"
   archive:
     dependency: transitive
     description:
@@ -77,7 +77,7 @@ packages:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "1.6.1"
   build_runner_core:
     dependency: transitive
     description:
@@ -181,7 +181,7 @@ packages:
     description:
       path: "packages/flutter_web"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -190,7 +190,7 @@ packages:
     description:
       path: "packages/flutter_web_ui"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -200,7 +200,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.18"
+    version: "0.1.19"
   glob:
     dependency: transitive
     description:
@@ -277,7 +277,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.18"
+    version: "0.3.19"
   logging:
     dependency: transitive
     description:
diff --git a/web/charts/flutter/pubspec.lock b/web/charts/flutter/pubspec.lock
index 7e1057a6a..36c1d7826 100644
--- a/web/charts/flutter/pubspec.lock
+++ b/web/charts/flutter/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   analyzer:
     dependency: transitive
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.36.3"
+    version: "0.36.4"
   args:
     dependency: transitive
     description:
@@ -76,7 +76,7 @@ packages:
     description:
       path: "packages/flutter_web"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -85,7 +85,7 @@ packages:
     description:
       path: "packages/flutter_web_test"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -94,7 +94,7 @@ packages:
     description:
       path: "packages/flutter_web_ui"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -104,7 +104,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.18"
+    version: "0.1.19"
   glob:
     dependency: transitive
     description:
@@ -174,7 +174,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.18"
+    version: "0.3.19"
   logging:
     dependency: "direct main"
     description:
@@ -414,4 +414,4 @@ packages:
     source: hosted
     version: "2.1.16"
 sdks:
-  dart: ">=2.2.0 <3.0.0"
+  dart: ">=2.2.2 <3.0.0"
diff --git a/web/dad_jokes/pubspec.lock b/web/dad_jokes/pubspec.lock
index 653a792e5..1df6b6761 100644
--- a/web/dad_jokes/pubspec.lock
+++ b/web/dad_jokes/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   analyzer:
     dependency: transitive
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.36.3"
+    version: "0.36.4"
   archive:
     dependency: transitive
     description:
@@ -77,7 +77,7 @@ packages:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "1.6.1"
   build_runner_core:
     dependency: transitive
     description:
@@ -91,7 +91,7 @@ packages:
       name: build_web_compilers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   built_collection:
     dependency: transitive
     description:
@@ -154,7 +154,7 @@ packages:
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.7"
+    version: "1.2.8"
   fixnum:
     dependency: transitive
     description:
@@ -167,7 +167,7 @@ packages:
     description:
       path: "packages/flutter_web"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -176,7 +176,7 @@ packages:
     description:
       path: "packages/flutter_web_ui"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -186,7 +186,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.18"
+    version: "0.1.19"
   glob:
     dependency: transitive
     description:
@@ -263,7 +263,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.18"
+    version: "0.3.19"
   logging:
     dependency: transitive
     description:
@@ -468,4 +468,4 @@ packages:
     source: hosted
     version: "2.1.16"
 sdks:
-  dart: ">=2.3.0-dev.0.1 <3.0.0"
+  dart: ">=2.3.0 <3.0.0"
diff --git a/web/filipino_cuisine/pubspec.lock b/web/filipino_cuisine/pubspec.lock
index 653a792e5..1df6b6761 100644
--- a/web/filipino_cuisine/pubspec.lock
+++ b/web/filipino_cuisine/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   analyzer:
     dependency: transitive
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.36.3"
+    version: "0.36.4"
   archive:
     dependency: transitive
     description:
@@ -77,7 +77,7 @@ packages:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "1.6.1"
   build_runner_core:
     dependency: transitive
     description:
@@ -91,7 +91,7 @@ packages:
       name: build_web_compilers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   built_collection:
     dependency: transitive
     description:
@@ -154,7 +154,7 @@ packages:
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.7"
+    version: "1.2.8"
   fixnum:
     dependency: transitive
     description:
@@ -167,7 +167,7 @@ packages:
     description:
       path: "packages/flutter_web"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -176,7 +176,7 @@ packages:
     description:
       path: "packages/flutter_web_ui"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -186,7 +186,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.18"
+    version: "0.1.19"
   glob:
     dependency: transitive
     description:
@@ -263,7 +263,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.18"
+    version: "0.3.19"
   logging:
     dependency: transitive
     description:
@@ -468,4 +468,4 @@ packages:
     source: hosted
     version: "2.1.16"
 sdks:
-  dart: ">=2.3.0-dev.0.1 <3.0.0"
+  dart: ">=2.3.0 <3.0.0"
diff --git a/web/gallery/pubspec.lock b/web/gallery/pubspec.lock
index cb5f35331..56a31826f 100644
--- a/web/gallery/pubspec.lock
+++ b/web/gallery/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   analyzer:
     dependency: transitive
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.36.3"
+    version: "0.36.4"
   archive:
     dependency: transitive
     description:
@@ -84,7 +84,7 @@ packages:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "1.6.1"
   build_runner_core:
     dependency: transitive
     description:
@@ -98,7 +98,7 @@ packages:
       name: build_web_compilers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   built_collection:
     dependency: transitive
     description:
@@ -161,7 +161,7 @@ packages:
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.7"
+    version: "1.2.8"
   fixnum:
     dependency: transitive
     description:
@@ -174,7 +174,7 @@ packages:
     description:
       path: "packages/flutter_web"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -183,7 +183,7 @@ packages:
     description:
       path: "packages/flutter_web_test"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -192,7 +192,7 @@ packages:
     description:
       path: "packages/flutter_web_ui"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -202,7 +202,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.18"
+    version: "0.1.19"
   glob:
     dependency: transitive
     description:
@@ -286,7 +286,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.18"
+    version: "0.3.19"
   logging:
     dependency: transitive
     description:
@@ -554,4 +554,4 @@ packages:
     source: hosted
     version: "2.1.16"
 sdks:
-  dart: ">=2.3.0-dev.0.1 <3.0.0"
+  dart: ">=2.3.0 <3.0.0"
diff --git a/web/github_dataviz/pubspec.lock b/web/github_dataviz/pubspec.lock
index 622ee6d23..5e78fc2d6 100644
--- a/web/github_dataviz/pubspec.lock
+++ b/web/github_dataviz/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   analyzer:
     dependency: transitive
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.36.3"
+    version: "0.36.4"
   archive:
     dependency: transitive
     description:
@@ -77,7 +77,7 @@ packages:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "1.6.1"
   build_runner_core:
     dependency: transitive
     description:
@@ -91,7 +91,7 @@ packages:
       name: build_web_compilers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   built_collection:
     dependency: transitive
     description:
@@ -154,7 +154,7 @@ packages:
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.7"
+    version: "1.2.8"
   fixnum:
     dependency: transitive
     description:
@@ -167,7 +167,7 @@ packages:
     description:
       path: "packages/flutter_web"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -176,7 +176,7 @@ packages:
     description:
       path: "packages/flutter_web_ui"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -186,7 +186,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.18"
+    version: "0.1.19"
   glob:
     dependency: transitive
     description:
@@ -263,7 +263,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.18"
+    version: "0.3.19"
   logging:
     dependency: transitive
     description:
@@ -468,4 +468,4 @@ packages:
     source: hosted
     version: "2.1.16"
 sdks:
-  dart: ">=2.3.0-dev.0.1 <3.0.0"
+  dart: ">=2.3.0 <3.0.0"
diff --git a/web/particle_background/pubspec.lock b/web/particle_background/pubspec.lock
index 03d734371..4d83f8512 100644
--- a/web/particle_background/pubspec.lock
+++ b/web/particle_background/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   analyzer:
     dependency: transitive
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.36.3"
+    version: "0.36.4"
   archive:
     dependency: transitive
     description:
@@ -77,7 +77,7 @@ packages:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "1.6.1"
   build_runner_core:
     dependency: transitive
     description:
@@ -91,7 +91,7 @@ packages:
       name: build_web_compilers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   built_collection:
     dependency: transitive
     description:
@@ -154,7 +154,7 @@ packages:
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.7"
+    version: "1.2.8"
   fixnum:
     dependency: transitive
     description:
@@ -167,7 +167,7 @@ packages:
     description:
       path: "packages/flutter_web"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -176,7 +176,7 @@ packages:
     description:
       path: "packages/flutter_web_ui"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -186,7 +186,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.18"
+    version: "0.1.19"
   glob:
     dependency: transitive
     description:
@@ -263,7 +263,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.18"
+    version: "0.3.19"
   logging:
     dependency: transitive
     description:
@@ -468,4 +468,4 @@ packages:
     source: hosted
     version: "2.1.16"
 sdks:
-  dart: ">=2.3.0-dev.0.1 <3.0.0"
+  dart: ">=2.3.0 <3.0.0"
diff --git a/web/slide_puzzle/pubspec.lock b/web/slide_puzzle/pubspec.lock
index b90d0e24c..55ab15bbe 100644
--- a/web/slide_puzzle/pubspec.lock
+++ b/web/slide_puzzle/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   analyzer:
     dependency: transitive
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.36.3"
+    version: "0.36.4"
   archive:
     dependency: transitive
     description:
@@ -77,7 +77,7 @@ packages:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "1.6.1"
   build_runner_core:
     dependency: transitive
     description:
@@ -91,7 +91,7 @@ packages:
       name: build_web_compilers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   built_collection:
     dependency: transitive
     description:
@@ -154,7 +154,7 @@ packages:
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.7"
+    version: "1.2.8"
   fixnum:
     dependency: transitive
     description:
@@ -167,7 +167,7 @@ packages:
     description:
       path: "packages/flutter_web"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -176,7 +176,7 @@ packages:
     description:
       path: "packages/flutter_web_ui"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -186,7 +186,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.18"
+    version: "0.1.19"
   glob:
     dependency: transitive
     description:
@@ -263,7 +263,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.18"
+    version: "0.3.19"
   logging:
     dependency: transitive
     description:
@@ -477,4 +477,4 @@ packages:
     source: hosted
     version: "2.1.16"
 sdks:
-  dart: ">=2.3.0-dev.0.1 <3.0.0"
+  dart: ">=2.3.0 <3.0.0"
diff --git a/web/spinning_square/pubspec.lock b/web/spinning_square/pubspec.lock
index 622ee6d23..5e78fc2d6 100644
--- a/web/spinning_square/pubspec.lock
+++ b/web/spinning_square/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   analyzer:
     dependency: transitive
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.36.3"
+    version: "0.36.4"
   archive:
     dependency: transitive
     description:
@@ -77,7 +77,7 @@ packages:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "1.6.1"
   build_runner_core:
     dependency: transitive
     description:
@@ -91,7 +91,7 @@ packages:
       name: build_web_compilers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   built_collection:
     dependency: transitive
     description:
@@ -154,7 +154,7 @@ packages:
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.7"
+    version: "1.2.8"
   fixnum:
     dependency: transitive
     description:
@@ -167,7 +167,7 @@ packages:
     description:
       path: "packages/flutter_web"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -176,7 +176,7 @@ packages:
     description:
       path: "packages/flutter_web_ui"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -186,7 +186,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.18"
+    version: "0.1.19"
   glob:
     dependency: transitive
     description:
@@ -263,7 +263,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.18"
+    version: "0.3.19"
   logging:
     dependency: transitive
     description:
@@ -468,4 +468,4 @@ packages:
     source: hosted
     version: "2.1.16"
 sdks:
-  dart: ">=2.3.0-dev.0.1 <3.0.0"
+  dart: ">=2.3.0 <3.0.0"
diff --git a/web/timeflow/pubspec.lock b/web/timeflow/pubspec.lock
index 03d734371..4d83f8512 100644
--- a/web/timeflow/pubspec.lock
+++ b/web/timeflow/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   analyzer:
     dependency: transitive
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.36.3"
+    version: "0.36.4"
   archive:
     dependency: transitive
     description:
@@ -77,7 +77,7 @@ packages:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "1.6.1"
   build_runner_core:
     dependency: transitive
     description:
@@ -91,7 +91,7 @@ packages:
       name: build_web_compilers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   built_collection:
     dependency: transitive
     description:
@@ -154,7 +154,7 @@ packages:
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.7"
+    version: "1.2.8"
   fixnum:
     dependency: transitive
     description:
@@ -167,7 +167,7 @@ packages:
     description:
       path: "packages/flutter_web"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -176,7 +176,7 @@ packages:
     description:
       path: "packages/flutter_web_ui"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -186,7 +186,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.18"
+    version: "0.1.19"
   glob:
     dependency: transitive
     description:
@@ -263,7 +263,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.18"
+    version: "0.3.19"
   logging:
     dependency: transitive
     description:
@@ -468,4 +468,4 @@ packages:
     source: hosted
     version: "2.1.16"
 sdks:
-  dart: ">=2.3.0-dev.0.1 <3.0.0"
+  dart: ">=2.3.0 <3.0.0"
diff --git a/web/vision_challenge/pubspec.lock b/web/vision_challenge/pubspec.lock
index 622ee6d23..5e78fc2d6 100644
--- a/web/vision_challenge/pubspec.lock
+++ b/web/vision_challenge/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   analyzer:
     dependency: transitive
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.36.3"
+    version: "0.36.4"
   archive:
     dependency: transitive
     description:
@@ -77,7 +77,7 @@ packages:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "1.6.1"
   build_runner_core:
     dependency: transitive
     description:
@@ -91,7 +91,7 @@ packages:
       name: build_web_compilers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   built_collection:
     dependency: transitive
     description:
@@ -154,7 +154,7 @@ packages:
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.7"
+    version: "1.2.8"
   fixnum:
     dependency: transitive
     description:
@@ -167,7 +167,7 @@ packages:
     description:
       path: "packages/flutter_web"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -176,7 +176,7 @@ packages:
     description:
       path: "packages/flutter_web_ui"
       ref: HEAD
-      resolved-ref: "1ed4317aa91038ba99531037ce00c04672c4bee1"
+      resolved-ref: f062546f09d0cec00c9c5df9fc5077ac9b122685
       url: "https://github.com/flutter/flutter_web"
     source: git
     version: "0.0.0"
@@ -186,7 +186,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.18"
+    version: "0.1.19"
   glob:
     dependency: transitive
     description:
@@ -263,7 +263,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.18"
+    version: "0.3.19"
   logging:
     dependency: transitive
     description:
@@ -468,4 +468,4 @@ packages:
     source: hosted
     version: "2.1.16"
 sdks:
-  dart: ">=2.3.0-dev.0.1 <3.0.0"
+  dart: ">=2.3.0 <3.0.0"