Remove Python 3.6 and add Python 3.11 to workflow (#223)

* Remove Python 3.6 and add Python 3.11 to workflow

* Update tox.ini

Author: zliang-akamai

.github/workflows/main.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.6','3.7','3.8','3.9','3.10']
+        python-version: ['3.7','3.8','3.9','3.10', '3.11']
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py36,py37,py38
+envlist = py37,py38,py39,py310,py311
 skip_missing_interpreters = true
 
 [testenv]