tox usage for the tests workflow

Author: SpectraL519

.github/workflows/tests.yaml

@@ -29,8 +29,8 @@ jobs:
 
       - name: Install dependencies
         run: |
-          python -m pip install pytest
+          python -m pip install tox
 
       - name: Run tests for ${{ matrix.python-version }}
         run: |
-          python -m pytest -v
+          python -m tox