enable prettier by default

[vonovak]

Summary

I removed "requirePragma": true from prettierrc because that option means prettier is not enabled unless explicitly turned on using the @format pragma (as it was in example/index.js).

After that I just ran eslint --fix and the code now follows the specified config.

Test Plan

• eslint passes (it does locally :) )

What's required for testing (prerequisites)?

What are the steps to reproduce (after prerequisites)?

Compatibility

OS	Implemented
iOS	✅❌
Android	✅❌

Checklist

• I have tested this on a device and a simulator
• I added the documentation in README.md
• I mentioned this change in CHANGELOG.md
• I updated the typed files (TS and Flow)
• I added a sample use of the API in the example project (example/App.js)

[msand]

Mind rebasing on master?

[vonovak]

@msand done; also rmeoved "git add" from lint-staged because I was getting

⚠ Some of your tasks use git add command. Please remove it from the config since all modifications made by tasks will be automatically added to the git commit index.