Add support for TypeScript usage with typescript-eslint-parser

[kripod]

Using typescript-eslint-parser, ESLint configurations can be enforced on TypeScript files.

Modifying .js,.jsx to .js,.jsx,.ts,.tsx in the following files would fix most of the issues with TypeScript integration:

• https://github.com/airbnb/javascript/blob/master/packages/eslint-config-airbnb/rules/react.js
• https://github.com/airbnb/javascript/blob/master/packages/eslint-config-airbnb-base/rules/imports.js

[ljharb]

You can overwrite those yourself; at this time we’re not going to make that change here.