Replace travis with github action

[steveoh]

more fun with github actions!

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (main@177a0fe). Click here to learn what that means.
The diff coverage is n/a.

@@ Coverage Diff @@## main #13 +/- ##
========================================
Coverage ? 100.00% ========================================
Files ? 1 Lines ? 6 Branches ? 0 ========================================
Hits ? 6 Misses ? 0 Partials ? 0 

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 177a0fe...3021376. Read the comment docs.

[stdavis]

This is awesome. I'm liking GH actions.

What is the difference between codecov and coveralls? Competing services? I like the codecov report message.

[steveoh]

What is the difference between codecov and coveralls? Competing services? I like the codecov report message.

two competing services, one integrates better with GHA