Depends on 'develop' branch of emqtt

rebar.config

@@ -29,7 +29,7 @@
     [{test,
         [{deps,
             [{bbmustache, "1.7.0"}, % hex
-             {emqtt, {git, "https://github.com/emqx/emqtt", {tag, "v1.0.1"}}},
+             {emqtt, {git, "https://github.com/emqx/emqtt", {branch, "develop"}}},
              {emqx_ct_helpers, {git, "https://github.com/emqx/emqx-ct-helpers", {branch, "develop"}}}
             ]}
         ]}