Github actions compatibility

[TArch64]

Hi guys. We have this tool on pre-push hook and it works fine but when I try to run it on github actions it fails with errors. Seems like this method returns incorrect name of branch https://github.com/barzik/branch-name-lint/blob/723b21604d83d96663ae8f8938608e6fb2897726/index.js#L84

Github logs

Actual name of branch

Link to github actions: here

Actual behaviour: Ability to lint name of source branch in actions

[TArch64]

As an option we can add ability to specify branch name to lint via env variable or cli option. Github allows to get name from env variable https://stackoverflow.com/a/58034787/9904159