Update build.yml

Author: torresc24

.github/workflows/build.yml

@@ -24,11 +24,9 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           python -m pip install sphinx
+          pip install tox-travis
           pip install sphinx_rtd_theme
           pip install virtualenv==20.0.1
-      - name: Install tox
-        if: ${{ matrix.python-version }} != 3.4 
-        run: pip install tox tox-gh-actions
       - name: Test with tox
         if: ${{ matrix.python-version }} != 3.4
         run: |