Test on later python versions as well

Author: arunkannawadi

.github/workflows/pythonpackage.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.8]
+        python-version: [3.8, 3.9, "3.10"]
         os: [ubuntu-latest, macos-latest, windows-latest]
 
     steps: