Bump react-native to 0.73.1, expo to 50 (#2214)

* Bump to react-native@0.73, bump expo@next

Includes bumps for all expo deps and dev dependencies. Updates
react-native patch and others, and removes the babel-preset-expo patch.

* Remove duplicate Splash ref

* Bump more deps

* Properly install expo-notifications

* Bump webview dep

* Bump packages according to expo fix; remove pager-view patch as it is no longer needed

* Don't access expo-camera from Web

* Fix crypto dep on web

* Fix some type issues

* Build esnext modules to support dynamic imports

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Co-authored-by: Paul Frazee <pfrazee@gmail.com>

src/view/com/post/Post.tsx

@@ -221,6 +221,7 @@ const styles = StyleSheet.create({
     paddingBottom: 5,
     paddingLeft: 10,
     borderTopWidth: 1,
+    // @ts-ignore web only -prf
     cursor: 'pointer',
   },
   layout: {