Integrate Airbnb Style Guide/Prettier/ eslint

[cgilly2fast]

In the TypeScript 2019 Roadmap, the TypeScript core team explains that ESLint has a more performant architecture than TSLint and that they will only be focusing on ESLint when providing editor linting integration for TypeScript.

For that reason, we should remove tslint and set up and eslint with the Airbnb style guide and with prettier so developers can leverage the auto fomatting feature.

Helpful links

Using ESLint and Prettier in a TypeScript Project

VSCode ESLint, Prettier & Airbnb Style Guide Setup