Upgrading samples to flutter_lints, part 1 of n (#804)

platform_design/pubspec.lock

@@ -56,7 +56,7 @@ packages:
       name: english_words
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.0.0-nullsafety.0"
+    version: "4.0.0"
   fake_async:
     dependency: transitive
     description:
@@ -69,6 +69,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
   flutter_lorem:
     dependency: "direct main"
     description:
@@ -81,6 +88,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  lints:
+    dependency: transitive
+    description:
+      name: lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
   matcher:
     dependency: transitive
     description:
@@ -102,13 +116,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.0"
-  pedantic:
-    dependency: "direct dev"
-    description:
-      name: pedantic
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.10.0"
   sky_engine:
     dependency: transitive
     description: flutter