Add python 3.10 and 3.11 to CI

Author: curusarn

.github/workflows/main.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: ['2.7', '3.5', '3.6', '3.7', '3.8', '3.9']
+        python-version: ['2.7', '3.5', '3.6', '3.7', '3.8', '3.9', '3.10', '3.11']
 
     steps:
     - uses: actions/checkout@v1