[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

@@ -30,7 +30,7 @@ packages = find_namespace:
 install_requires =
     Sphinx>=1.8
     lxml>=4.5.2
-python_requires = >=3.8
+python_requires = >=3.9
 include_package_data = True
 package_dir =
     = src