We will use Intern as a testing framework because it seamlessly
integrates with chai for running tests, as well as vast testing
capabilities and onboard TypeScript support.

The sample.js contains a simple test that should integrate with TravisCI
and will be deleted when tests are implemented.

Whoops, I forgot to add the object descriptor..

This completes the basic setup and makes it possible to:
- run tests using the intern testrunner (npm test)
- mock dependencies using testdouble
Note: Electron can't be mocked by td itself, so providing a manual mock
is needed. This should be modularized in the future.