Update mustache in Gemfile.lock

Keep up to date with required gems.

Author: oestrich

Gemfile.lock

@@ -56,7 +56,7 @@ GEM
     minitest (4.7.5)
     multi_json (1.8.2)
     multi_test (0.0.2)
-    mustache (0.99.4)
+    mustache (0.99.5)
     nokogiri (1.5.2)
     rack (1.5.2)
     rack-oauth2 (0.14.4)