Update rebar.config

rebar.config

@@ -1,4 +1,2 @@
-{deps, [
-	{cowlib, ".*", {git, "https://github.com/ninenines/cowlib.git", "1.0.0"}},
-	{ranch, ".*", {git, "https://github.com/ninenines/ranch.git", "1.0.0"}}
-]}.
+{deps, [{cowlib,".*",{git,"https://github.com/ninenines/cowlib","1.0.2"}},{ranch,".*",{git,"https://github.com/ninenines/ranch","1.2.0"}}]}.
+{erl_opts, [debug_info,warn_export_all,warn_export_vars,warn_shadow_vars,warn_obsolete_guard,warn_missing_spec]}.