feat: Drop support for Python 3.8 and add support for Python 3.12

[carloslubbers]

BREAKING CHANGE for users of Python 3.8, please update to the latest version of Python (3.12)

[yurnih]

In addition, since Python 3.9 will be the minimum required version, they polyfill created in utils could be removed too (and some of those references).

GEOLib/geolib/models/utils.py

Lines 6 to 27 in 456f98e

	if sys.version_info < (3, 9):
	# Python 3.9 does not include `_special`, so use the function from typing instead
	def get_args(tp):
	"""Get type arguments with all substitutions performed.
	For unions, basic simplifications used by Union constructor are performed.
	Examples:
	get_args(Dict[str, int]) == (str, int)
	get_args(int) == ()
	get_args(Union[int, Union[T, int], str][int]) == (int, str)
	get_args(Union[int, Tuple[T, int]][str]) == (int, Tuple[str, int])
	get_args(Callable[[], T][int]) == ([], int)
	"""
	if isinstance(tp, (_GenericAlias, _SpecialForm)) and not tp._special:
	res = tp.__args__
	if tp.__origin__ is collections.abc.Callable and res[0] is not Ellipsis:
	res = (list(res[:-1]), res[-1])
	return res
	return ()
	else:
	from typing import get_args as get_args # NOQA

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication