Automate release cycle via GitHub Actions

[jefflester]

• Create pull request (master <- #.#.#-update) with updated version numbers
  • Version numbers in: version file, readme, and setup.py
  • Verify version numbers all equal the version number of the release branch name
• Delete existing 0.0.0 release/tag
• Create 0.0.0 release/tag based on PR branch (allows for pulling Minitrino library in automated tests for the latest build)
• Wait for CLI tests to pass (run through tests in the test directory)

-- Continue Here --

• Create release/tag - mark as pre-release
• Test PyPi upload, then test package download, library pull, and a basic set of CLI commands
• Upload to production PyPi, then test package download, library pull, and a basic set of CLI commands
• Merge PR
• Unmark release as pre-release, and mark as “most recent release”
• Delete update branch

[jefflester]

Got everything up until the PyPi release wrapped with #63. This is about halfway done.

[jefflester]

Closed with #69