Replace htmlentities with newer html-entities

lib/utils/common.js

@@ -1,7 +1,7 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-const htmlentities = require('htmlentities')
+const entities = new (require('html-entities').XmlEntities)()
 const jsesc = require('jsesc')
 const utils = require('../utils')
 
@@ -79,7 +79,7 @@ class common extends utils {
    * @returns {string}
    */
   static htmlEscape (str) {
-    return htmlentities.encode(str)
+    return entities.encode(str)
   }
 
   /**
@@ -88,7 +88,7 @@ class common extends utils {
    * @returns {string}
    */
   static htmlUnescape (str) {
-    return htmlentities.decode(str)
+    return entities.decode(str)
   }
 
   /**

package.json

@@ -79,7 +79,7 @@
     "webpack-cli": "^3.1.0"
   },
   "dependencies": {
-    "htmlentities": "^1.0.0",
+    "html-entities": "^1.2.1",
     "jsesc": "^2.5.1"
   }
 }