Bump python versions

Author: lejafar

.github/workflows/main.yml

@@ -9,7 +9,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python: [3.8, 3.7, 3.6, 3.5]
+        python: [3.10, 3.9, 3.8, 3.7, 3.6, 3.5]
     steps:
       - uses: actions/checkout@v2
         with: