Integrate tox with github actions.

Author: nzlosh

.github/workflows/check.yml

@@ -25,7 +25,7 @@ jobs:
           python-version: "${{ matrix.python-version }}"
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip tox
-          tox
+          python -m pip install --upgrade pip
+          python -m pip install tox tox-gh-actions
       - name: "Run tox for ${{ matrix.python-version }}"
-        run: make check
+        run: tox