Bump to 0.8.6.

Author: ryanlovett

setup.py

@@ -2,7 +2,7 @@
 
 setuptools.setup(
     name="nbserverproxy",
-    version='0.8.5',
+    version='0.8.6',
     url="https://github.com/jupyterhub/nbserverproxy",
     author="Ryan Lovett & Yuvi Panda",
     author_email="[email protected]",