fixed setup.cfg properties

setup.cfg

@@ -4,7 +4,8 @@ author = Christopher Timperley
 author-email = christimperley@googlemail.com
 home-page = https://github.com/ChrisTimperley/Kaskara
 description = A simple, unified API for various static analysers
-long-description = file: README.rst, LICENSE
+description-file = README.rst
+license-file = LICENSE
 keywords = static analysis, c++, python, source code, program analysis
 license = Apache-2.0
 classifiers =