dropped python 3.6 support because it is deprecated and so we can somewhat use | as type union

Author: wolph

.github/workflows/main.yml

@@ -11,7 +11,7 @@ jobs:
     timeout-minutes: 2
     strategy:
       matrix:
-        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.7', '3.8', '3.9', '3.10']
 
     steps:
       - uses: actions/checkout@v2

setup.py

@@ -30,7 +30,6 @@
         tests_require=['pytest'],
         extras_require={
             'docs': [
-                'six',
                 'mock',
                 'sphinx',
                 'python-utils',

tox.ini

@@ -1,10 +1,9 @@
 [tox]
-envlist = py36, py37, py38, py39, py310, pypy3, flake8, docs
+envlist = py37, py38, py39, py310, pypy3, flake8, docs
 skip_missing_interpreters = True
 
 [testenv]
 basepython =
-    py36: python3.6
     py37: python3.7
     py38: python3.8
     py39: python3.9