tox.ini: Add py311 in ignore_errors mode

tox.ini

@@ -1,6 +1,6 @@
 # content of: tox.ini, put in same dir as setup.py
 [tox]
-envlist = clean,py{36,37,38,39,310},report
+envlist = clean,py{36,37,38,39,310,311},report
 
 [gh-actions]
 python =
@@ -9,6 +9,7 @@ python =
     3.8: py38
     3.9: py39
     3.10: py310
+    3.11: py311
 
 [testenv]
 deps = -r requirements-test.txt
@@ -17,8 +18,8 @@ commands =
     {envpython} -m pip check
     pytest --cov --cov-append --cov-context=test --cov-config=tox.ini {posargs}
 depends =
-    py{36,37,38,39,310}: clean
-    report: py{36,37,38,39,310}
+    py{36,37,38,39,310,311}: clean
+    report: py{36,37,38,39,310,311}
 
 [testenv:clean]
 basepython = python3.8
@@ -35,7 +36,7 @@ commands =
     coverage report
     coverage html
 
-[testenv:py310]
+[testenv:py311]
 ignore_errors = true
 
 [pytest]