From DuniterPy configuration

Add additional E1120 (no-value-for-parameter) exception due to
click context: https://stackoverflow.com/a/49680253

Drop following disables: R0902,R0903,R0912,R0914,R0915

Install types-tabulate subs:
  - TODO: to be removed once tabulate has been dropped
ignore_missing_imports: Ignore dependencies such as DuniterPy

Change in the CI, changes in the documentation

Enable branch check in release.sh, can be commented for releases
on other branches for maintenance releases.

https://docs.pytest.org/en/latest/changelog.html#pytest-7-0-0rc1-2021-12-06
https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst#300-2021-10-04

https://python-poetry.org/docs/pyproject/#include-and-exclude

- pyproject: set minimun Python version to 3.7.0
- Remove v3.6 test job
- Upgrade pyupgrade to --py37-plus

https://docs.pytest.org/en/6.2.x/changelog.html#pytest-6-2-5-2021-08-29

Not necessary, since they are now in pre-commit virtualenv

Configure isort in the pyproject to use black format

otherwise it's not working without the poetry.lock

The `license` property sets the License classifier automatically:
https://python-poetry.org/docs/pyproject/#classifiers

Remove developers classifier

Which comes with initial GVA support

Requires Python 3.6.8
Remove test job

Not compatible with Poetry v1.0
Update dependencies

- Set poetry-core v1.0.0 as requirement and new build system
https://python-poetry.org/blog/announcing-poetry-1-1-0.html