Change minimum Python version to 3.7 and remove Poetry version

.github/workflows/pytest.yml

@@ -6,7 +6,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ "3.6", "3.7", "3.8", "3.9", "3.10" ]
+        python-version: [ "3.7", "3.8", "3.9", "3.10" ]
         os: [ ubuntu-latest, macos-latest, windows-latest ]
     runs-on: ${{ matrix.os }}
     steps:
@@ -17,7 +17,5 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Run image
         uses: abatilo/actions-poetry@v2
-        with:
-          poetry-version: ${{ matrix.poetry-version }}
       - name: Run tests
         run: poetry run pytest