update url in setup.py

Author: flagboy

setup.py

@@ -38,7 +38,7 @@ def read_from(file):
       keywords='push webpush publication',
       author="jr conlin",
       author_email="[email protected]",
-      url='https://github.com/jrconlin/pywebpush',
+      url='https://github.com/web-push-libs/pywebpush',
       license="MPL2",
       test_suite="nose.collector",
       include_package_data=True,