Switch to Python 3.11 final on CI and add to tox file (#6325)

Author: browniebroke

.github/workflows/run-tests.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11-dev"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
         os: [ubuntu-18.04, macOS-latest, windows-latest]
         include:
           # pypy-3.7 on Mac OS currently fails trying to compile

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py{37,38,39,310}-{default, use_chardet_on_py3}
+envlist = py{37,38,39,310,311}-{default, use_chardet_on_py3}
 
 [testenv]
 deps = -rrequirements-dev.txt