[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

@@ -8,14 +8,12 @@ url = https://github.com/glotaran/pyglotaran-alias
 author = Sebastian Weigand
 author_email = [email protected]
 license = Apache-2.0
-license_file = LICENSE
+license_files = LICENSE
 classifiers =
     Development Status :: 4 - Beta
     License :: OSI Approved :: Apache Software License
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.8
-    Programming Language :: Python :: 3.9
     Programming Language :: Python :: Implementation :: CPython
     Topic :: Scientific/Engineering
     Topic :: Scientific/Engineering :: Chemistry