Use main repo for testing

[hexmode]

oops, meant to include this and the last commit in a single pull request.

[hexmode]

Looks like we need to tell Scrutinizer to use composer 2 and dev repos are ok.

[hexmode]

@gesinn-it, @JeroenDeDauw could you look at what I've done with github actions on my fork of this repo and see if that is an ok replacement for travis-ci?

• Github's reference for actions file: https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions
• Actions: https://github.com/hexmode/SemanticApprovedRevs/blob/master/.github/workflows/main.yaml
• Result of actions on the @hexmode fork: https://github.com/hexmode/SemanticApprovedRevs/actions