refactor(platform): change exports so parcel and rollup can solve them

Author: Eduardo Campaña

src/platforms/dom.js

@@ -1 +1,2 @@
-export * from 'react-dom';
+// eslint-disable-next-line camelcase
+export { unstable_batchedUpdates } from 'react-dom';

src/platforms/native.js

@@ -1 +1,2 @@
-export * from 'react-native';
+// eslint-disable-next-line camelcase
+export { unstable_batchedUpdates } from 'react-native';