pyproject, tox, tests: set oldest version supported to 3.10

Below 3.10, annotations for dict and list requires to import List and Dict from typing but pyserde does not support it

Normally we don't have any python environnement with python 3.8 or 3.9

We can't support python 3.12 and after in the tests because pytest-virtualenv do not support it yet

.github/workflows/tests.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, windows-latest, macos-latest]
-        python-version: ['3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.10', '3.11']
 
     steps:
       - uses: actions/checkout@v4

pyproject.toml

@@ -11,7 +11,7 @@ name = "cython_setuptools"
 description = "Cython setuptools integration"
 dynamic = ["version"]
 readme = "README.md"
-requires-python = "~=3.8"
+requires-python = "~=3.10"
 keywords = ["cython", "setuptools"]
 authors = [{name = "Luper Rouch", email= "[email protected]"}]
 maintainers = [{ name = "Marco Treglia", email = "[email protected]" }]
@@ -33,7 +33,8 @@ dev = [
     "virtualenv",
     "cython",
     "pytest-virtualenv",
-    "six"]
+    "six",
+]
 
 [metadata]
 long_description = "file:README.md"

tox.ini

@@ -1,11 +1,9 @@
 [tox]
-envlist = py38, py39, py310, py311
+envlist = py310, py311
 isolated_build = true
 
 [gh-actions]
 python =
-    3.8: py38,
-    3.9: py39,
     3.10: py310, flake8
     3.11: py311,