removed magic issue number 1 and renamed the issue param to issue_id to better indicate that it's a number.
refactored issue param to issue_id here as well so we know it's a number.
add globals for states and labels
add methods for closes and reopening pull requests
- reject_failing_pull for closing a PR and label it 'failing' when CI fails on that PR
- reopen_succusfull_pull for reopening a PR that is now succesfull and removes the 'failing' label.