github: unit-tests: add job for python 3.10

Signed-off-by: Bastian Krause <[email protected]>

Author: Bastian-Krause

.github/workflows/unit-tests.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.7', '3.8', '3.9']
+        python-version: ['3.7', '3.8', '3.9', '3.10']
         experimental: [false]
     steps:
     - uses: actions/checkout@v2