Housekeeping: Set codecov api key

[bosd]

Currently I'm working on utilizing a cookiecutter template for this module.
One of the features is parallel code checking with codecov.

Recent changes of the codev api, requires one to use a token.

@m3nu Can you setup the codecov token for this repo?
See https://docs.codecov.com/docs/adding-the-codecov-token for instructions on how to do this

[bosd]

@m3nu ,
I have followed the guide:

Installation request sent.
Since you're a member of the requested organization, you need the owner to approve and install the app.

Copy the link below and share it with your organization's admin or owner to assist.
could you help approve the installation of the Codecov app on GitHub for our organization? Here's the link: https://github.com/apps/codecov/installations/select_target