增加mqtt

node_modules/es6-map/is-native-implemented.js

@@ -1,9 +0,0 @@
-// Exports true if environment provides native `Map` implementation,
-// whatever that is.
-
-'use strict';
-
-module.exports = (function () {
-	if (typeof Map === 'undefined') return false;
-	return (Object.prototype.toString.call(new Map()) === '[object Map]');
-}());