Robotframework-remoterunner

Features:
- Full support for the latest versions of robotframework. Backward compatibility now only goes to robotframework==3.1.1
- Migrated the CI from GitLab to GitHub Actions to allow pipelines to be triggered by repo forks.
- Extended testing to run against more versions of Python as well as MacOs and Windows
- Uplifted package metadata to use the new Python build API (PEP-517/PEP-518)
- Added code coverage and pylint checks on the CI pipeline
- Removed every instance of 'slave' to be more politically correct
- General code tidy up (and pylint fixes)

- Defined formal entry-points for the slave and executor script.
- Added an upper bound on the dependency requirements on robotframework. They have just released robotframework==3.2 that has completely different test suite parsing code that this package is not yet compatible with.

New Features:
* A Suite's dependencies are now packages and sent over to the remote machine
* Extended automated testing
* Pythonic logging