use relative imports to keep python2 happy

Callum Oakley · Callum Oakley · commit 3c2690478c67 · 2016-10-17T17:30:18.000+01:00
diff --git a/pusher/__init__.py b/pusher/__init__.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
 
-from pusher.pusher import Pusher
+from .pusher import Pusher
 
 __all__ = ['Pusher']
