move down _modules transformer

src/babel/transformation/transformers/index.js

@@ -1,6 +1,4 @@
 export default {
-  _modules:                                require("./internal/modules"),
-
   "utility.removeDebugger":                require("./utility/remove-debugger"),
   "utility.removeConsole":                 require("./utility/remove-console"),
 
@@ -9,6 +7,8 @@ export default {
 
   "minification.deadCodeElimination":      require("./minification/dead-code-elimination"),
 
+  _modules:                                require("./internal/modules"),
+
   "es7.classProperties":                   require("./es7/class-properties"),
   "es7.trailingFunctionCommas":            require("./es7/trailing-function-commas"),
   "es7.asyncFunctions":                    require("./es7/async-functions"),