drop 3.9 which reaches EOL this month

maybe it fixes the windows build issue?

Author: anthrotype

pyproject.toml

@@ -13,7 +13,7 @@ build-backend = "setuptools.build_meta"
 [tool.cibuildwheel]
 # Also skip wheels for free-threaded CPython 3.14 (e.g. 'cp314t') until we
 # actually support them. We currently aren't thread-safe as we define HB_NO_MT=1.
-skip = ["cp38-*", "cp3??t-*"]
+skip = ["cp38-*", "cp39-*", "cp3??t-*"]
 enable = ["pypy"]
 test-requires = "pytest"
 test-command = "pytest {project}/tests"

setup.py

@@ -36,8 +36,8 @@ def bool_from_environ(key: str, default: bool = False):
 # Set USE_PY_LIMITED_API=0 to turn it off.
 # https://docs.python.org/3.14/c-api/stable.html#limited-c-api
 use_py_limited_api = bool_from_environ("USE_PY_LIMITED_API", default=True)
-# NOTE: this must be kept in sync with python_requires='>=3.9' below
-limited_api_min_version = "0x03090000"
+# NOTE: this must be kept in sync with python_requires='>=3.10' below
+limited_api_min_version = "0x030A0000"
 
 
 def _configure_extensions_with_system_libs() -> List[Extension]:
@@ -180,11 +180,11 @@ def configure_extensions() -> List[Extension]:
     packages=["uharfbuzz"],
     zip_safe=False,
     setup_requires=["setuptools_scm"],
-    python_requires=">=3.9",
+    python_requires=">=3.10",
     ext_modules=cythonize(
         configure_extensions(),
         annotate=use_cython_annotate,
         compiler_directives={"linetrace": use_cython_linetrace},
     ),
-    options={"bdist_wheel": {"py_limited_api": "cp39"}} if use_py_limited_api else {},
+    options={"bdist_wheel": {"py_limited_api": "cp310"}} if use_py_limited_api else {},
 )