Maintenance on jsonexample (#205)

jsonexample/pubspec.lock

@@ -1,20 +1,20 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
   analyzer:
     dependency: transitive
     description:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.38.5"
-  analyzer_plugin:
-    dependency: transitive
-    description:
-      name: analyzer_plugin
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.1"
+    version: "0.39.2+1"
   archive:
     dependency: transitive
     description:
@@ -63,14 +63,14 @@ packages:
       name: build_daemon
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.2"
   build_resolvers:
     dependency: transitive
     description:
       name: build_resolvers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.1"
+    version: "1.3.0"
   build_runner:
     dependency: "direct dev"
     description:
@@ -91,21 +91,21 @@ packages:
       name: built_collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.3.0"
+    version: "4.3.2"
   built_value:
     dependency: "direct main"
     description:
       name: built_value
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.8.2"
+    version: "7.0.4"
   built_value_generator:
     dependency: "direct dev"
     description:
       name: built_value_generator
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.8.2"
+    version: "7.0.4"
   charcode:
     dependency: transitive
     description:
@@ -126,7 +126,7 @@ packages:
       name: code_builder
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.2.0"
+    version: "3.2.1"
   collection:
     dependency: transitive
     description:
@@ -179,13 +179,6 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
-  front_end:
-    dependency: transitive
-    description:
-      name: front_end
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.1.27"
   glob:
     dependency: transitive
     description:
@@ -213,7 +206,7 @@ packages:
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.0+2"
+    version: "0.12.0+3"
   http_multi_server:
     dependency: transitive
     description:
@@ -255,21 +248,14 @@ packages:
       name: json_annotation
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0"
+    version: "3.0.1"
   json_serializable:
     dependency: "direct dev"
     description:
       name: json_serializable
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.2.3"
-  kernel:
-    dependency: transitive
-    description:
-      name: kernel
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.3.27"
+    version: "3.2.5"
   logging:
     dependency: transitive
     description:
@@ -400,7 +386,7 @@ packages:
       name: source_gen
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.9.4+6"
+    version: "0.9.4+7"
   source_span:
     dependency: transitive
     description: