Change URL to https

Author: iMicknl

setup.py

@@ -3,7 +3,7 @@
 setup(name='postnl_api',
       version='0.2',
       description='Python wrapper for the PostNL API, a way to track packages using their online portal',
-      url='http://github.com/imicknl/python-postnl-api',
+      url='https://github.com/imicknl/python-postnl-api',
       author='Mick Vleeshouwer',
       author_email='mick@imick.nl',
       license='MIT',