* Drop Travis CI
* Update DEPLOY.md about new workflow of uploading new version to PyPI
* Upload coverage data to Codecov
Co-Authored-By: Steve Kowalik <steven@wedontsleep.org>
To integrate better with the GitHub workflow, add a workflow for
checking pushes and PRs. This doesn't remove the Travis configuration,
which is still required for releases.
Co-Authored-By: Christian Clauss <cclauss@me.com>