Remove python 3.6 and 3.7, add 3.10 and 3.11

Author: russss

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: [3.8, 3.9, 3.10, 3.11]
 
     steps:
     - uses: actions/checkout@v2