Add url

Author: learnforpractice

setup.py

@@ -23,7 +23,8 @@
     version="0.2.0",
     description="Mixin Binding Project",
     author='learnforpractice',
-    license="MIT",
+    url="https://github.com/learnforpractice/mixin-python",
+    license="GPL-3.0",
     packages=['mixin'],
     package_dir={'mixin': 'pysrc'},
     package_data={'mixin': []},