Pybuilder-anybadge

* update badges
* use pyb coverage

- complexity badge contains letter grade
- coverage badge rounds to integer

- fix: set `anybadge_use_shields` default value
- build: update gha to share image artifact

- set `anybadge_use_shields` default to True
- add ability to update values of badges in README.md
- add ability to set Python badge for all supported versions
- add ability to build app on all supported Python versions

- Update build for Python 3.9

- Update img.shields.io green color code