BUG: Update tox.ini, setup.cfg for Python 3.8 drop, 3.11 add

setup.cfg

@@ -14,9 +14,9 @@ classifiers =
     Topic :: Software Development :: Testing
     Programming Language :: Python
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
     Operating System :: OS Independent
     License :: OSI Approved :: Apache Software License
 

tox.ini

@@ -1,33 +1,33 @@
 # For more information about tox, see https://tox.readthedocs.io/en/latest/
 [tox]
-envlist = py{38,39,310}-{linux,macos,windows}
+envlist = py{39,310,311}-{linux,macos,windows}
 isolated_build=true
 
 [gh-actions]
 python =
-    3.8: py38
     3.9: py39
     3.10: py310
-
+    3.11: py311
+
 [gh-actions:env]
 PLATFORM =
     ubuntu-latest: linux
     macos-latest: macos
     windows-latest: windows
 
 [testenv]
-platform = 
+platform =
     macos: darwin
     linux: linux
     windows: win32
-passenv = 
+passenv =
     CI
     GITHUB_ACTIONS
-    DISPLAY 
+    DISPLAY
     XAUTHORITY
     NUMPY_EXPERIMENTAL_ARRAY_FUNCTION
     PYVISTA_OFF_SCREEN
-deps = 
+deps =
     pytest  # https://docs.pytest.org/en/latest/contents.html
     pytest-cov  # https://pytest-cov.readthedocs.io/en/latest/
     # you can remove these if you don't use them