Add CI

[maximbaz]

Lint succeeds, test will fail due to outdated Cargo.lock (decided not to fix it right away to demo how a failure would look like in Github UI)

You may need to allow or activate Github Action in the project to let it run :)

[Gskartwii]

Ah thank you! I'll be making a v0.2.8 with the updated Cargo.lock shortly.