Merge remote-tracking branch 'upstream/master' into feature/200

Author: erickok

example/lib/generated_plugin_registrant.dart

@@ -4,15 +4,13 @@
 
 // ignore_for_file: lines_longer_than_80_chars
 
-import 'package:url_launcher_web/url_launcher_web.dart';
 import 'package:video_player_web/video_player_web.dart';
 import 'package:wakelock_web/wakelock_web.dart';
 
 import 'package:flutter_web_plugins/flutter_web_plugins.dart';
 
 // ignore: public_member_api_docs
 void registerPlugins(Registrar registrar) {
-  UrlLauncherPlugin.registerWith(registrar);
   VideoPlayerPlugin.registerWith(registrar);
   WakelockWeb.registerWith(registrar);
   registrar.registerMessageHandler();

pubspec.yaml

@@ -9,33 +9,32 @@ environment:
 
 dependencies:
   # Plugin for parsing html
-  html: ^0.15.0
+  html: '>=0.15.0 <1.0.0'
 
   # Plugins for parsing css
-  csslib: ^0.17.0
-  css_colors: ^1.1.0
+  csslib: '>=0.17.0 <1.0.0'
 
   # Plugins for rendering the <table> tag.
-  flutter_layout_grid: ^1.0.1
+  flutter_layout_grid: '>=1.0.1 <2.0.0'
 
   # Plugins for rendering the <video> tag.
-  video_player: ^2.1.1
-  chewie: ^1.0.0
+  video_player: '>=2.1.1 <3.0.0'
+  chewie: '>=1.0.0 <2.0.0'
 
   # Plugin for rendering the <iframe> tag.
-  webview_flutter: ^2.0.4
+  webview_flutter: '>=2.0.4 <3.0.0'
 
   # Plugins for rendering the <audio> tag.
-  chewie_audio: ^1.2.0
+  chewie_audio: '>=1.2.0 <2.0.0'
 
   # Plugins for rendering the <svg> tag.
-  flutter_svg: ^0.22.0
+  flutter_svg: '>=0.22.0 <1.0.0'
 
   # Plugin for rendering MathML
-  flutter_math_fork: ^0.3.2+1
+  flutter_math_fork: '>=0.3.2+1 <1.0.0'
 
   # plugin for firstWhereOrNull extension on lists
-  collection: ^1.15.0
+  collection: '>=1.15.0 <2.0.0'
 
   flutter:
     sdk: flutter