Pin the goldrush dep to a SHA

rebar.config

@@ -2,7 +2,7 @@
 {erl_first_files, ["src/lager_util.erl"]}.
 {deps, [
         {goldrush, ".*",
-            {git, "git://github.com/DeadZen/goldrush.git", "master"}}
+            {git, "git://github.com/DeadZen/goldrush.git", {tag, "7ff9b03"}}}
        ]}.
 
 {cover_enabled, true}.