Add typescript linting for compiler source

[run1t]

The compiler source are now all in typescript maybe it can be a good idea to add a tslint.json to ensure the consistency of the code.

Related to #2890, c8fbde4.

By the way 8fd94ae remove some functionalities from eslint but in c8fbde4 eslint seems to be removed.

[maxmilton]

Rather than using TSLint which will be deprecated, it would be better to add TypeScript support to ESLint instead. See https://github.com/typescript-eslint/typescript-eslint.

I've been using this in my projects and other than some known performance issues (which I'm sure will be ironed out soon) it works great. Some TSLint rules are not yet available but are rapidly being added to that project.

[run1t]

Yes you're right ! Didn't notice that 😄

I will close this one and open a new one: Add TypeScript support to ESLint.