Remove confusing lint rules

[rsexton404]

Changes

• Move lint rule on curly brace formatting that is incompatible with Prettier
• Remove lint rules that require a newline at the end of the file and sorted proptypes

How To Test

• Clone this repo and check out this branch
• Run npm link inside the mobify-code-style
• In any project that has mobify-code-style as a dependency, run npm link mobify-code-style
• Open any source file in the project and try to trigger the lint errors
• Run the linter: npm run lint or use an ESLint extension for your editor
• You should not see lint erros for the formatting issues described in the changes section

TODOs:

• +1
• Updated README
• Updated CHANGELOG