chore: export react-native exports from thread

Author: cawfree

example/index.thread.js

@@ -1,3 +1,4 @@
+import * as RN from 'react-native';
 import {self} from '@exodus/react-native-threads';
 
-self.onmessage = message => self.postMessage(message);
+self.onmessage = message => self.postMessage(JSON.stringify(Object.keys(RN)));