feat(web/RN): update React to v16 and React Native to 0.49

index.android.js

@@ -1 +1,26 @@
-export * from './react/index.native';
+// The type field of react-native application loader's React Element is created
+// as number and not Symbol, because it's not been defined by the polyfill yet.
+// We import the application renderer, before Symbol is defined, in order to use
+// number types as well. Otherwise this will result in the invariant exception,
+// because fiber thingy will not recognise root react-native component as React
+// Element, but as an Object.
+//
+// See node_modules/react-native/Libraries/polyfills/babelHelpers.js
+// :babelHelpers.createRawReactElement - that's where first react-native element
+// is created (super early - it's the app loader).
+//
+// See node_modules/react-native/Libraries/Renderer/ReactNativeFiber-dev.js
+// and look for REACT_ELEMENT_TYPE definition - it's defined later when Symbol
+// has been defined and type will not match.
+//
+// As an alternative solution we could stop using/polyfilling Symbols and
+// replace with classpath string constants or some kind of a wrapper around
+// that.
+
+import 'react-native/Libraries/ReactNative/renderApplication';
+
+// Android doesn't provide Symbol
+import 'es6-symbol/implement';
+
+import './react/index.native';
+