Codecov coverage reports

[thomasrockhu]

Hi, Tom from Codecov here.

I thought it would be useful to add useful code coverage metrics to this repository. Codecov is a hosted code coverage provider with awesome features. You can checkout your first reports here.

I would love all the feedback you have, and please don't hesitate to reach out.

Cheers, Tom

Codecov ❤️'s open source and will be free forever for OSS