Bump hacking to 0.9.x series

Change-Id: Ic21d2f72a073575db40500e38f2bd59e68d95dfa
diff --git a/test-requirements.txt b/test-requirements.txt
index 34a7a6b..99ada89 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,4 +1,4 @@
-hacking>=0.5.6,<0.8
+hacking>=0.9.2,<0.10
 
 coverage>=3.6
 sphinx>=1.1.2,<1.2