Creopyson

* BugFix:
* Correction for `drawing.set_view_loc` (issue 84)

* BugFix:
* Correction for `layer.delete` ([issue68](https://github.com/Zepmanbc/creopyson/issues/68))

* BugFix:
* Add missing `location` argument on note_set ([issue62](https://github.com/Zepmanbc/creopyson/issues/62))

Update for Creoson 2.8.1 release.

* Add parameters:
* bom_get_paths : get_simpreps
* Documentation update:
* creo_set_creo_version : Creo 8 support.

* Add *is not None* almost everywhere to prevent *False* and *None* confusion
* Migrates to Github Workflow
* Remove pipenv stuff

* change python_requires to ">=3.7