[setup.py] Update to latest Python 2&3 compatible format

Author: SamuelMarks

setup.py

@@ -40,7 +40,7 @@ def to_funcs(*paths):
 if __name__ == "__main__":
     with open(path.join(package_name, "__init__.py")) as f:
         __author__, __version__ = map(
-            lambda const: const.value if version_info > (3, 6) else const.s,
+            lambda const: const.value if hasattr(const, "value") else const.s,
             map(
                 attrgetter("value"),
                 map(