CI - move to github actions

Travis has been running slow. There are already Actions being used within this library so let's consolidate and move our CI build to it

Review the repository's existing GitHub Actions workflows alongside the Travis CI configuration; the issue does not name specific files. Identify how the current build is triggered and what checks Travis runs, then consolidate those checks under GitHub Actions and confirm the build passes without relying on Travis.

Written by the indexing model from the issue text.