Patch and Dev Bump to start our new release version process (flutter#4950)

Moving forward we will be doing daily dev version bumps. We have set up this process to fail if the master branch isn't on a -dev.\d+ version, so that the automation won't interfere if anyone is doing a release.

This bump puts the master branch version in a place where we can start doing those daily dev bumps.

Author: CoderDake

packages/devtools_app/lib/devtools.dart

@@ -7,4 +7,4 @@
 // that updates all versions for DevTools.
 // Note: a regexp in tools/update_version.dart matches the following line so
 // if you change it you must also modify tools/update_version.dart.
-const String version = '2.20.0';
+const String version = '2.21.0-dev.0';

packages/devtools_app/lib/src/framework/about_dialog.dart

@@ -29,7 +29,7 @@ class DevToolsAboutDialog extends StatelessWidget {
         mainAxisSize: MainAxisSize.min,
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
-          Row(
+          Wrap(
             children: [
               const SelectableText('DevTools version ${devtools.version}'),
               const Text(' - '),
@@ -55,7 +55,7 @@ class DevToolsAboutDialog extends StatelessWidget {
           ...dialogSubHeader(theme, 'Contributing'),
           Wrap(
             children: const [
-              Text('Want to contribute to DevTools? Please see our '),
+              Text('Want to contribute to DevTools?'),
               _ContributingLink(),
               Text(' guide, or '),
             ],

packages/devtools_app/pubspec.yaml

@@ -4,7 +4,7 @@ publish_to: none
 
 # Note: this version should only be updated by running tools/update_version.dart
 # that updates all versions of devtools packages (devtools_app, devtools_test).
-version: 2.20.0
+version: 2.21.0-dev.0
 
 repository: https://github.com/flutter/devtools/tree/master/packages/devtools_app
 
@@ -25,7 +25,7 @@ dependencies:
   collection: ^1.15.0
   dds: ^2.2.2
   dds_service_extensions: ^1.3.1
-  devtools_shared: 2.20.0
+  devtools_shared: 2.21.0-dev.0
   file: ^6.0.0
   file_selector: ^0.8.0
   file_selector_linux: ^0.0.2
@@ -64,7 +64,7 @@ dependencies:
 
 dev_dependencies:
   build_runner: ^2.0.4
-  devtools_test: 2.20.0
+  devtools_test: 2.21.0-dev.0
   flutter_test:
     sdk: flutter
   mockito: ^5.1.0

packages/devtools_app/web/index.html

@@ -51,7 +51,7 @@
        application. For more information, see:
        https://developers.google.com/web/fundamentals/primers/service-workers -->
   <script>
-    var version = '2.20.0';
+    var version = '2.21.0-dev.0';
     var scriptLoaded = false;
     function loadMainDartJs() {
       if (scriptLoaded) {

packages/devtools_shared/pubspec.yaml

@@ -1,7 +1,7 @@
 name: devtools_shared
 description: Package of shared structures between devtools_app, dds, and other tools.
 
-version: 2.20.0
+version: 2.21.0-dev.0
 
 repository: https://github.com/flutter/devtools/tree/master/packages/devtools_shared
 

packages/devtools_test/pubspec.yaml

@@ -7,7 +7,7 @@ publish_to: none
 # When publishing new versions of this package be sure to publish a new version
 # of package:devtools as well. package:devtools contains a compiled snapshot of
 # this package.
-version: 2.20.0
+version: 2.21.0-dev.0
 
 repository: https://github.com/flutter/devtools/tree/master/packages/devtools_test
 
@@ -18,8 +18,8 @@ environment:
 dependencies:
   async: ^2.0.0
   collection: ^1.15.0
-  devtools_shared: 2.20.0
-  devtools_app: 2.20.0
+  devtools_shared: 2.21.0-dev.0
+  devtools_app: 2.21.0-dev.0
   flutter:
     sdk: flutter
   flutter_test: