WIP - Update to Fable 3

[tforkmann]

I'm worked on updating Nightwatch at night ;) Following tasks are done:

• [x] Fable 3
• [x] NET5
• [x] FAKE 5
• [x] Run app on iOS
• [ ] Run app on android
• [ ] Clean up and bring back simple store

[tforkmann]

With android I'm right now blocked. I can't revolve Fable.React.Native.3.0.0-alpha001. Its working on iOS with that same setting. Not sure what to do now.

[Tue Dec 08 2020 22:47:19.392]  BUNDLE  ./index.js 

error: Error: Unable to resolve module `./.fable/Fable.React.Native.3.0.0-alpha001/Fable.ReactNative.fs.js` from `out/Nightwatch.js`: 

None of these files exist:
  * out/.fable/Fable.React.Native.3.0.0-alpha001/Fable.ReactNative.fs.js(.native|.android.js|.native.js|.js|.android.json|.native.json|.json|.android.ts|.native.ts|.ts|.android.tsx|.native.tsx|.tsx)

[tforkmann]

Tried to run it today again. Still got the same issue.