Drop support for Python 3.9

Python 3.9 is EOL and coverage 7.11.0 supports only Python >= 3.10

Author: benoit74

.github/workflows/Tests.yaml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [macos-13, windows-2022, ubuntu-24.04]
-        python: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
       - uses: actions/checkout@v5

pyproject.toml

@@ -11,7 +11,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "libzim"
 version = "3.7.1-dev0"
-requires-python = ">=3.9,<3.15"
+requires-python = ">=3.10,<3.15"
 description = "A python-facing API for creating and interacting with ZIM files"
 authors = [
     {name = "openZIM", email = "[email protected]"},
@@ -30,7 +30,6 @@ classifiers = [
     "Intended Audience :: Developers",
     "Programming Language :: Cython",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -140,10 +139,8 @@ archs = ["x86_64", "aarch64"]
 archs = ["x86_64", "arm64"]
 # macOS arm64 is cross-compiled and can not be tested.
 # cibuildwheel skips it already. *_arm64 this removes the warning
-# skipping tests on cp <=3.9 as the wheels we produce are on unexpected combinations
-# because those python versions were released before our building host version
 # > requires changing wheel names
-test-skip = "*_arm64 cp39*"
+test-skip = "*_arm64"
 
 [tool.hatch.build]
 exclude = [
@@ -169,7 +166,7 @@ features = ["scripts", "test"]
 PROFILE = "1"
 
 [[tool.hatch.envs.test.matrix]]
-python = ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+python = ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
 [tool.hatch.envs.test.scripts]
 run = "inv test --args '{args}'"