Update setup.cfg

SetuptoolsDeprecationWarning: Invalid dash-separated options

Author: nullablebool

setup.cfg

@@ -1,6 +1,6 @@
 [bdist_rpm]
 doc_files = docs extras AUTHORS INSTALL LICENSE README.rst
-install-script = scripts/rpm-install.sh
+install_script = scripts/rpm-install.sh
 
 [flake8]
 exclude = build,.git,.tox,./django/utils/six.py,./django/conf/app_template/*,./tests/.env
@@ -17,4 +17,4 @@ multi_line_output = 5
 not_skip = __init__.py
 
 [metadata]
-license-file = LICENSE
+license_files = LICENSE