Roll version to 20

packages/flutter/CHANGELOG.md

+## 0.0.20
+
+  - 167 changes: https://github.com/domokit/mojo/compare/f2830c7...603f589
+
 ## 0.0.19
 
   - 49 changes: https://github.com/domokit/mojo/compare/a64559a...1b8968c

packages/flutter/example/demo_launcher/apk/AndroidManifest.xml

@@ -3,7 +3,7 @@
      Use of this source code is governed by a BSD-style license that can be
      found in the LICENSE file.
  -->
-<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="org.domokit.sky.demo" android:versionCode="19" android:versionName="0.0.19">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="org.domokit.sky.demo" android:versionCode="20" android:versionName="0.0.20">
 
     <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="21" />
     <uses-permission android:name="android.permission.INTERNET" />

packages/flutter/example/demo_launcher/apk/release_notes/0.0.20.txt

+Fixes crash on Nexus 6

packages/flutter/pubspec.yaml

@@ -11,4 +11,4 @@ environment:
   sdk: '>=1.8.0 <2.0.0'
 homepage: https://github.com/domokit/mojo/tree/master/sky
 name: sky
-version: 0.0.19
+version: 0.0.20