Add support for Python v3.11

• Fix deprecation warning about typing.re.Pattern
• Introduce tests:3.11 job
• Set default PYTHON_VERSION to 3.11
• Move coverage to 3.11 job
• Bump pytest-cov to v4

Close #194 (closed)

duniterpy/documents/document.py

@@ -17,8 +17,7 @@ import base64
 import hashlib
 import logging
 import re
-from typing import Any, Dict, Optional, Type, TypeVar
-from typing.re import Pattern
+from typing import Any, Dict, Optional, Pattern, Type, TypeVar
 
 from ..constants import SIGNATURE_REGEX
 from ..key import SigningKey, VerifyingKey