Test with CPython 3.11 (#2388)

Author: gaborbernat

.github/workflows/check.yml

@@ -17,6 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         py:
+          - "3.11.0-beta.4"
           - "3.10"
           - "3.9"
           - "3.8"

tox.ini

@@ -1,11 +1,12 @@
 [tox]
 envlist =
     fix_lint
+    py311
+    py310
     py39
     py38
     py37
     py36
-    py35
     pypy3
     coverage
     readme
@@ -76,12 +77,12 @@ commands =
     python -m coverage html -d {toxworkdir}/htmlcov
     python -m diff_cover.diff_cover_tool --compare-branch {env:DIFF_AGAINST:origin/main} {toxworkdir}/coverage.xml
 depends =
+    py311
+    py310
     py39
     py38
     py37
     py36
-    py35
-    py27
     pypy
     pypy3