Flipper Release: v0.15.0

Summary:
- Added build-headless yarn target for producing a headless binary
- Crash Reporter plugin added. Details [here](https://fbflipper.com/docs/crash-reporter-plugin.html).
- Bug fixes and dependency updates

- Desktop notifications for all kinds of crashes with their callstack
- Desktop notifications when an exception occurs within [Litho's error boundaries](https://fblitho.com/docs/error-boundaries)
- Ability to deeplink to the crash entry in the Logs plugin for Android. This feature is not available in iOS as the callstack doesn't get logged through Flipper's Logs plugin
- Ability to copy the stacktrace by right-clicking it
- Ability to see the list of crashes in the Notifications hub

Reviewed By: passy

Differential Revision: D13880665

fbshipit-source-id: 92a3455bb826b6fb22858e2c4c88c0b9ace91a5f

docs/getting-started.md

@@ -48,7 +48,7 @@ repositories {
 }
 
 dependencies {
-  debugImplementation 'com.facebook.flipper:flipper:0.14.2'
+  debugImplementation 'com.facebook.flipper:flipper:0.15.0'
   debugImplementation 'com.facebook.soloader:soloader:0.5.1'
 }
 ```
@@ -103,7 +103,7 @@ project 'MyApp.xcodeproj'
 source 'https://github.com/facebook/flipper.git'
 source 'https://github.com/CocoaPods/Specs'
 swift_version = "4.1"
-flipperkit_version = '0.14.2'
+flipperkit_version = '0.15.0'
 
 target 'MyApp' do
   platform :ios, '9.0'
@@ -178,7 +178,7 @@ project 'MyApp.xcodeproj'
 source 'https://github.com/facebook/flipper.git'
 source 'https://github.com/CocoaPods/Specs'
 swift_version = "4.1"
-flipperkit_version = '0.14.2'
+flipperkit_version = '0.15.0'
 
 target 'MyApp' do
   platform :ios, '9.0'