[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

setup.cfg

@@ -27,7 +27,7 @@ install_requires =
     numpy>=1.18
     scipy>=1.4
     importlib-metadata>=1.0;python_version < "3.8"
-python_requires = >=3.8
+python_requires = >=3.9
 
 [options.extras_require]
 docs =