Hi Jake,
Yikes! Well, let’s home that github does not follow suit. Luckily we have migrated already most of our projects and all new ones to using github actions, such as SynBioHub. The SBOL2 libraries though I think are the main thing that is till using Travis-CI. If those libraries are frozen at this point (or at some point soon), then it may not be worth the effort to move their testing over to GitHub Actions, but we should certainly make sure all SBOL3 efforts are using GitHub Actions.
Thanks for catching this.
Best wishes,