Support for Python 3.11 (current stable)

requirements_dev.txt

@@ -1,9 +1,9 @@
-pip==19.2.3
+pip==23.2.1
 bump2version==0.5.11
 wheel==0.33.6
 watchdog==0.9.0
 flake8==3.7.8
-tox==3.14.0
+tox==4.11.3
 coverage==4.5.4
 Sphinx==1.8.5
 m2r==0.2.1
@@ -11,5 +11,5 @@ twine==1.14.0
 sphinxemoji==0.1.7
 
 
-pytest==4.6.5
+pytest==6.2.5
 pytest-runner==5.1

setup.cfg

@@ -22,5 +22,4 @@ exclude = docs
 test = pytest
 
 [tool:pytest]
-collect_ignore = ['setup.py']
-
+addopts = --ignore=setup.py

tox.ini

@@ -1,8 +1,11 @@
 [tox]
-envlist = py35, py36, py37, py38, flake8
+envlist = py35, py36, py37, py38, py39, py310, py311, flake8
 
 [travis]
 python =
+    3.11: py311
+    3.10: py310
+    3.9: py39
     3.8: py38
     3.7: py37
     3.6: py36