Support for SafeAreaView

[nickineering]

Summary

Adds support for SafeAreaView components.

Test Plan

See this demo repo: https://github.com/nferrara100/side-menu-safe-area

Follow the commit history. I create a blank expo project, show how safe areas are not supported, and then add support by changing to my fork of react-native-side-menu.

Compatibility

OS	Implemented
iOS	✅
Android	✅

Checklist

• [x] I have tested this on a device and a simulator
• [N/A] I added the documentation in README.md
• [Could not find] I mentioned this change in CHANGELOG.md
• [N/A] I updated the typed files (TS and Flow)
• [x] I added a sample use of the API in the example project (example/App.js)

[chakrihacker]

Thanks for the PR, will merge in some time, can you please update the branch

[nickineering]

@chakrihacker, just updated it. Sorry for the delay.