Fixed wrong operating system fields

Author: Byron

setup.py

@@ -41,8 +41,8 @@
         "License :: OSI Approved :: BSD License",
         "Operating System :: OS Independent",
         "Operating System :: POSIX",
-        "Operating System :: Windows",
-        "Operating System :: OSX",
+        "Operating System :: Microsoft :: Windows",
+        "Operating System :: MacOS :: MacOS X",
         "Programming Language :: Python",
     ],
     long_description=long_description,