An invoice cannot be considered due if it has not been sent (and thus
still a 'DRAFT').
This change adds a `WHERE status != 'DRAFT'` to each invoice query in
the dashboard controller.
Additionally, this change replaces `->get()->count()` calls to just
`->count()`, which should be equivalent and more efficient.
* Create PHP CS Fixer config and add to CI workflow
* Run php cs fixer on project
* Add newline at end of file
* Update to use PHP CS Fixer v3
* Run v3 config on project
* Run seperate config in CI
