Merge remote-tracking branch 'origin/master' into fix-mkdir-with-parents

.github/workflows/python-app.yml

@@ -23,11 +23,11 @@ jobs:
         path: |
           ~/.cache
         # An explicit key for restoring and saving the cache
-        key: evaldata-cache-3
+        key: evaldata-cache-4
     - name: Set up Python 3.9
       uses: actions/setup-python@v2
       with:
-        python-version: 3.9
+        python-version: 3.9.4
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip