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

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

setup.cfg

@@ -5,7 +5,7 @@ description = Machine code disassembly and IR translation library
 long_description = file: README.md
 long_description_content_type = text/markdown
 url = https://github.com/angr/pypcode
-license_file = LICENSE.txt
+license_files = LICENSE.txt
 classifiers =
     Programming Language :: Python
     Programming Language :: Python :: 3