test against python3.11 & declare compatibility

.github/workflows/python.yml

@@ -38,6 +38,7 @@ jobs:
         - '3.8'
         - '3.9'
         - '3.10'
+        - '3.11'
       fail-fast: false
     steps:
     - uses: actions/checkout@v3

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- declare compatibility with `python3.11`
 
 ## [1.0.0] - 2022-08-01
 ### Added

setup.py

@@ -46,6 +46,7 @@ setuptools.setup(
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
         "Topic :: Utilities",
     ],
     entry_points={