Add 3.10 to testing

Author: linuxdaemon

.github/workflows/pythonapp.yml

@@ -18,6 +18,7 @@ jobs:
         - '3.7'
         - '3.8'
         - '3.9'
+        - '3.10'
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3