#332: Drop Python v3.6 support, Bump DuniterPy to v1.1.0

• pyproject: set minimun Python version to 3.7.0
• Remove v3.6 test job
• Upgrade pyupgrade to --py37-plus
• Bump DuniterPy to v1.1.0

Close #332 (closed).

changed milestone to %0.10.0

added CI/CD Dev Env DuniterPy Py ≥ 3.7 labels

requested review from @matograine

assigned to @moul

changed the description

requested review from @moul and removed review request for @matograine

approved this merge request

merged