Mohammed: setup Travis

[rarmatei]

Travis is a great tool for ensuring our project remains in a healthy state.
Travis can be used to check, every time somebody submits a pull request, if the followed all the ESLint rules, and if they have not broken any tests.

Please read the intro here: https://docs.travis-ci.com/user/for-beginners
And then the getting started guide here: https://docs.travis-ci.com/user/getting-started

Once you have a better understanding of Travis, please submit a PR with a .travis.yml file that runs the npm script you created earlier for checking ESLint errors.