Switch to Github Actions

[mbhall88]

Additionally, the test suite isn't running on travis as we have a negative credit balance. Maybe I should open another issue to move on to github actions?

Originally posted by @mbhall88 in #138 (comment)

Do we pay for travis? I don't really get the negative credit thing. Is there any impediment to us moving to Actions, aside from the creation of a new CI workflow config? (I have a number of python project Actions we can steal heavily from.)

[iqbal-lab]

We don't pay for Travis, maybe they changed to a paid model? Weird. I thought github actions got closed because too many people ran bitcoin mining in it

[mbhall88]

I thought github actions got closed because too many people ran bitcoin mining in it

🤣 I had not heard that.

It is definitely still going - all my projects use it for CI.