Move to official 3.11 CI (#318)

* Move to official 3.11 CI

* See if we run without tox-gh-actions - I don't use this on other projects and don't see obvious benefits here ...

Author: cooperlees

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11.0-rc - 3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
 
         os: [ubuntu-latest]
 
@@ -25,9 +25,9 @@ jobs:
       run: |
         python -m pip install --upgrade pip setuptools
 
-    - name: Install tox and tox-gh-actions
+    - name: Install tox
       run: |
-        python -m pip install tox tox-gh-actions
+        python -m pip install tox
 
     - name: Run tox
       run: |