v0.31.0

@satya164

Thanks to 101 contributors who put 228 commits into this release!

Special thanks to @satya164 for writing these release notes!

General

Fix the getRowData method of SwipeableListViewDataSource in SwipeableListView (ba3c7ef) - @sscaff1
Fix bug in cancelling last task in TaskQueue (9b184cc) - @sahrens
Fix Navigator transition (5189c94) - @hedgerwang
Use active scene passed in props by NavigationTransitioner (46a6851) - @jmurzy
Change NavigatorSceneConfig for RTL (cadc753) - @MengjueW
Don't block scroll when using non-touchable visible row for SwipeableRow (13a19a8) - @chirag04
RN: Change Time Drift Error into Warning (ed4db63) - @yungsters

Merge rnpm (e8b5081) - @grabbou @Kureev
Add JSCHelper function to easily install native hooks outside of JSCExecutor (f534560) - @astreet
Add MessageQueue method for executing function and returning its result (7fa677f) - @javache
Add completion callback to enqueueJSCall (23e28ec) - @javache
Add RTL support for SwipeableRow (7e5fc17) - @MengjueW
Export SwipeableListView component. (a2c6a7b) - @chenxsan
Implement TextInput onContentSizeChange (2537157) - @janicduplessis
Better error message when trying to parse a empty body in fetch (eeb9cd8) - @astreet
Provide RTL support for new Navigator -- Make RTL works in NUX (38a6eec) - @MengjueW
Open in editor button for yellow box (c65eb4e) - @skv-headless
Initial implementation of requestIdleCallback (18394fb, 5618c3f) - @janicduplessis
Throw flow error when trying to access a style that is not defined on a stylesheet to catch typos and unused styles (a564af8) - @brentvatne

Fix padding with Text on Android (c3f2bba) - @dmmiller
Fix timestamps on android touch events to use milliseconds, to be consistent with iOS (4f5c2b4) - @mikelambert
Don't hard crash if you get a null stack trace in Android (b5c3550) - @astreet
Fix removing views from ViewPagerAndroid (b0c023c) - @foghina
Fix handling of line height with inline images (c4ffc7d) - @rigdern
Fix Spacing lifecycle issue introduced by D3516692 (8c9f190) - @dmmiller
Fix 'Unexpected EOF' in old bridge (6d3c7b8) - @astreet
Fixed position of ripple-effect (d73446c) - @noerK
Fixed the issue due to which js assets are not bundled in the apk when separate build for different CPU architectures is enabled (c0316c6) - @kgritesh
Fix Android WebView additional schemes, e.g.- “tel:” (33a1f28) - @sathyapriya-31

Make getCurrentActivity public on ReactContext (7606564) - @marcshilling
Add support for layout gravity to ToastAndroid (12ec213) - @donyu
Support RefreshControl in RecyclerViewBackedScrollView in Android (0c0ac6e) - @tegon
Support geolocation in android webview (b7bf24b) - @jvassbo
Add new FileSourceProvider (5d06918) - @tadeuzagallo
Add API to CatalystInstanceImpl for executing optimized bundle (1331e20) - @michalgr
Allow apps to provide JSBundleLoader of their choice (e632025) - @michalgr

Fix double completion callback in RCTJavascriptLoader (4aedcc7) - @javache
Wrap native module I18nManager with a new RCTI18nManager.js and fix current use of native module I18nManager (471ee87) - @MengjueW
Fix misusage of NSUInteger * in RCTImageStoreManager (f317b9f) - @jesseluo
Fix description of AlertIOS.prompt()'s parameter defaultValue. (f38d9a1) - @yueshuaijie
Provide correct initial value for AppState.currentState (68b0ce6) - @rigdern
Fix TextInput stack overflow when pasting text in multiline input with maxlength (23e087f) - @javache
Create a CSSLayout CocoaPods subspec that preserves the header directories (ee89ffc) - @ide
Fix RCTImageLoader's priority (ffb690f) - @nathanajah

Add the ability to pre-create the JavaScript thread with RCTJSCExecutor (39cb110) - @adamjernst
Add responseType as a concept to RCTNetworking, send binary data as base64 (08c375f) - @philikon
Add ability to customize error messages and stacks within the iOS redbox (9d2e6a2) - @DavidGoldman
Add Image resizeMode center to iOS (bee1180) - @aleclarson
Add more profiling markers to RCTJSCExecutor (63e0e6c) - @javache
Add [RCTShadowView isCSSLeaf] for skipping css tree of children (0587c85) - @emilsjolander
Expose a way to get the JSContext from a RCTJSCExecutor (5323b77) - @adamjernst
Make bridge initialization configurable (4269003) - @javache