Lint all project files, not only the ones involved in the gulp processing.

[lucalanca]

Suggested action:

• Add npm script (npm run lint) that lints all javascript files in the project (including the ones inside gulp and even the gulpfile.js itself).

[lejoe]

mixed feelings on this one.

[lucalanca]

about the action or the issue? I feel that it sucks to have non-linted gulp tasks.