fix issue #68

Author: escherba

pyproject.toml

@@ -1,6 +1,3 @@
-[project]
-requires-python = ">=3.6"
-
 [build-system]
 build-backend = "setuptools.build_meta"
 requires = [

setup.py

@@ -152,6 +152,7 @@ def get_long_description(relpath, encoding="utf-8"):
     download_url=URL + "/tarball/master/" + VERSION,
     name="cityhash",
     license="MIT",
+    python_requires='>=3.6',
     zip_safe=False,
     cmdclass=CMDCLASS,
     ext_modules=EXT_MODULES,