upgrade examples to React Native 0.20.0

Example/.flowconfig

@@ -51,15 +51,15 @@ module.system=haste
 munge_underscores=true
 
 module.name_mapper='^image![a-zA-Z0-9$_-]+$' -> 'GlobalImageStub'
-module.name_mapper='^[./a-zA-Z0-9$_-]+\.png$' -> 'RelativeImageStub'
+module.name_mapper='^[./a-zA-Z0-9$_-]+\.\(bmp\|gif\|jpg\|jpeg\|png\|psd\|svg\|webp\|m4v\|mov\|mp4\|mpeg\|mpg\|webm\|aac\|aiff\|caf\|m4a\|mp3\|wav\|html\)$' -> 'RelativeImageStub'
 
 suppress_type=$FlowIssue
 suppress_type=$FlowFixMe
 suppress_type=$FixMe
 
-suppress_comment=\\(.\\|\n\\)*\\$FlowFixMe\\($\\|[^(]\\|(\\(>=0\\.\\(2[0-0]\\|1[0-9]\\|[0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*react_native[a-z,_]*\\)?)\\)
-suppress_comment=\\(.\\|\n\\)*\\$FlowIssue\\((\\(>=0\\.\\(2[0-0]\\|1[0-9]\\|[0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*react_native[a-z,_]*\\)?)\\)?:? #[0-9]+
+suppress_comment=\\(.\\|\n\\)*\\$FlowFixMe\\($\\|[^(]\\|(\\(>=0\\.\\(2[0-1]\\|1[0-9]\\|[0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*react_native[a-z,_]*\\)?)\\)
+suppress_comment=\\(.\\|\n\\)*\\$FlowIssue\\((\\(>=0\\.\\(2[0-1]\\|1[0-9]\\|[0-9]\\).[0-9]\\)? *\\(site=[a-z,_]*react_native[a-z,_]*\\)?)\\)?:? #[0-9]+
 suppress_comment=\\(.\\|\n\\)*\\$FlowFixedInNextDeploy
 
 [version]
-0.20.1
+0.21.0

Example/android/app/build.gradle

@@ -60,7 +60,8 @@ import com.android.build.OutputFile
 apply from: "react.gradle"
 
 /**
- * Set this to true to create two separate APKs instead of one:
+ * Set this to true to create three separate APKs instead of one:
+ *   - A universal APK that works on all devices
  *   - An APK that only works on ARM devices
  *   - An APK that only works on x86 devices
  * The advantage is the size of the APK is reduced by about 4MB.
@@ -72,7 +73,7 @@ def enableSeparateBuildPerCPUArchitecture = false
 /**
  * Run Proguard to shrink the Java bytecode in release builds.
  */
-def enableProguardInReleaseBuilds = true
+def enableProguardInReleaseBuilds = false
 
 android {
     compileSdkVersion 23
@@ -91,7 +92,7 @@ android {
     splits {
         abi {
             enable enableSeparateBuildPerCPUArchitecture
-            universalApk false  // Also generate an universal APK
+            universalApk false
             reset()
             include "armeabi-v7a", "x86"
         }
@@ -120,5 +121,5 @@ android {
 dependencies {
     compile fileTree(dir: "libs", include: ["*.jar"])
     compile "com.android.support:appcompat-v7:23.0.1"
-    compile "com.facebook.react:react-native:0.19.+"
+    compile "com.facebook.react:react-native:0.20.+"
 }

Example/android/app/proguard-rules.pro

@@ -42,8 +42,8 @@
 -keep class * extends com.facebook.react.bridge.NativeModule { *; }
 -keepclassmembers,includedescriptorclasses class * { native <methods>; }
 -keepclassmembers class *  { @com.facebook.react.uimanager.UIProp <fields>; }
--keepclassmembers class *  { @com.facebook.react.uimanager.ReactProp <methods>; }
--keepclassmembers class *  { @com.facebook.react.uimanager.ReactPropGroup <methods>; }
+-keepclassmembers class *  { @com.facebook.react.uimanager.annotations.ReactProp <methods>; }
+-keepclassmembers class *  { @com.facebook.react.uimanager.annotations.ReactPropGroup <methods>; }
 
 -dontwarn com.facebook.react.**