Update to match latest development cycle

Update python supported versions
Update tox versions and options

Change-Id: If5ae9133aaaafde833c38f742e82ccabef897650

setup.cfg

@@ -20,6 +20,7 @@ classifier =
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
 
 [files]
 data_files =

test-requirements.txt

@@ -1,5 +1,5 @@
 coverage>=4.0 # Apache-2.0
-stestr>=1.0.0 # Apache-2.0
+stestr>=2.0.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 

tox.ini

@@ -4,7 +4,6 @@ envlist = py3,pep8
 ignore_basepython_conflict=true
 
 [testenv]
-basepython = python3
 constrain_package_deps = true
 usedevelop = True
 setenv = VIRTUAL_ENV={envdir}
@@ -36,11 +35,10 @@ enable-extensions=H106,H203,H204,H205,H210,H904
 
 [testenv:pep8]
 deps =
-    flake8-import-order>=0.17.1 # LGPLv3
+    flake8-import-order~=0.18.0 # LGPLv3
     hacking~=6.1.0 # Apache-2.0
     pycodestyle>=2.0.0,<3.0.0 # MIT
-    Pygments>=2.2.0 # BSD
-    doc8>=0.6.0 # Apache 2.0
+    doc8~=1.1.0 # Apache 2.0
     -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
 commands =
     flake8 {posargs}