Add Continuous Integration via Github Action

[jpdakran]

• Add continuous integration via github actions

[jpdakran]

This is expected behavior. The linux processes should be passing for py36-39 while the macOS should be failing for py38 & py39. This is due to the python multiprocessing upgrades in py38/39 on macOS.

Once 505 & 507 are merged - We can verify all is passing and merge this.

[domanchi]

Pro Tip: You can use:

$ git commit --amend --no-edit
$ git push origin HEAD --force

to keep your git history clean. This way, you don't have many, many, many commits as you make small iterations to get CI passing.

[calvinli]

I totally forgot to mention, you should update the build status badge on README.md too :)

https://docs.github.com/en/actions/monitoring-and-troubleshooting-workflows/adding-a-workflow-status-badge