Add support for python 3.11

.gitlab-ci.yml

@@ -46,3 +46,11 @@ python3.10:
   stage: test
   script:
   - python -m unittest
+
+python3.11:
+  image: python:3.11
+  tags:
+  - passoft
+  stage: test
+  script:
+  - python -m unittest

setup.py

@@ -22,6 +22,7 @@ setup(
         'Natural Language :: English',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
     ],
     description="View mseed headers",
     entry_points={

tox.ini

 [tox]
-envlist = py39, py310, flake8
+envlist = py39, py310, py311, flake8
 
 [testenv:flake8]
 basepython = python