feat: ability to lint branches other then master
Currently, the validator for wei/pull (https://pull.git.ci/check/${owner}/${repo})only checks the master branch of the repository, but lists "no file found" if it is added in a branch other then master. This causes a problem of not being able to test/validate the .yml before merging.
Adding this would allow the ability to validate the pull.yml file before merging with the master file, allowing for testing before hand.