Replace Travis with GitHub Actions and Replace Travis Badge with Github Action Badge

[cwdavies]

This adds GitHub Action workflows for CI and release
Lint errors are also fixed in the PR due to isort 5.0:

• recursive – Prior to version 5.0.0, isort wouldn't automatically traverse directories. The --recursive option was necessary to tell it to do so. In 5.0.0 directories are automatically traversed for all Python files, and as such this option is no longer necessary and should simply be removed.
• not_skip – In an earlier version isort had a default skip of init.py. To get around that many projects wanted a way to not skip init.py or any other files that were automatically skipped in the future by isort. isort no longer has any default skips, so if the value here is init.py you can simply remove the setting.

https://timothycrosley.github.io/isort/docs/upgrade_guides/5.0.0/

Checklist

• Changes are limited to a single goal (no scope creep)
• Code can be automatically merged (no conflicts)
• Passes all existing automated tests

[Scotchester]

This is missing a new GitHub Actions job to run coveralls.

[cwdavies]

This is missing a new GitHub Actions job to run coveralls.

Thanks for this feedback. I added a job to run coveralls to GitHub Actions.