invoke: Updated invoke to latest version 0.13.0

requirements.txt

@@ -78,7 +78,7 b' gunicorn==19.6.0'
 
 gnureadline==6.3.3
 infrae.cache==1.0.1
-invoke==0.11.1
+invoke==0.13.0
 ipdb==0.8
 ipython==3.1.0
 iso8601==0.1.11