[PR] CI for tests

[GWillmann]

Hello @igorkasyanchuk,

Thanks for your work on this Gem!

I would like to work on this task in the TODO : CI for tests.

Which CI app did you have in mind? I see there is already a .travis.yml file in the project root.

Let me know if you had something in particular in mind please :)

[igorkasyanchuk]

Hi @GWillmann, I think the best is github actions. Recently one developer added it on abothter my gem - active_storage_validations

[igorkasyanchuk]

added github actions