[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

@@ -23,7 +23,7 @@ packages = find:
 install_requires =
     matplotlib
     numpy
-python_requires = >=3.8
+python_requires = >=3.9
 zip_safe = False
 
 [options.extras_require]