Update uglify-js to v3.1.0.

Author: XhmikosR

CHANGELOG

@@ -1,3 +1,7 @@
+v3.1.0:
+  date: 2017-09-11
+  changes:
+    - Update uglify-js to v3.1.0.
 v3.0.1:
   date: 2017-05-20
   changes:

README.md

@@ -1,4 +1,4 @@
-# grunt-contrib-uglify v3.0.1 [![Build Status: Linux](https://travis-ci.org/gruntjs/grunt-contrib-uglify.svg?branch=master)](https://travis-ci.org/gruntjs/grunt-contrib-uglify) [![Build Status: Windows](https://ci.appveyor.com/api/projects/status/ybtf5vbvtenii561/branch/master?svg=true)](https://ci.appveyor.com/project/gruntjs/grunt-contrib-uglify/branch/master)
+# grunt-contrib-uglify v3.1.0 [![Build Status: Linux](https://travis-ci.org/gruntjs/grunt-contrib-uglify.svg?branch=master)](https://travis-ci.org/gruntjs/grunt-contrib-uglify) [![Build Status: Windows](https://ci.appveyor.com/api/projects/status/ybtf5vbvtenii561/branch/master?svg=true)](https://ci.appveyor.com/project/gruntjs/grunt-contrib-uglify/branch/master)
 
 > Minify JavaScript files with UglifyJS
 
@@ -525,6 +525,7 @@ grunt.initConfig({
 
 ## Release History
 
+ * 2017-09-11   v3.1.0   Update uglify-js to v3.1.0.
  * 2017-05-20   v3.0.1   Fix toplevel option.
  * 2017-05-12   v3.0.0   Update uglify-js to v3.0.4.
  * 2017-04-05   v2.3.0   Make CLI output less verbose.
@@ -570,4 +571,4 @@ grunt.initConfig({
 
 Task submitted by ["Cowboy" Ben Alman](http://benalman.com)
 
-*This file was generated on Sat May 20 2017 19:52:43.*
+*This file was generated on Mon Sep 11 2017 13:21:40.*

package.json

@@ -1,7 +1,7 @@
 {
   "name": "grunt-contrib-uglify",
   "description": "Minify JavaScript files with UglifyJS",
-  "version": "3.0.1",
+  "version": "3.1.0",
   "author": {
     "name": "Grunt Team",
     "url": "http://gruntjs.com/"

test/fixtures/expected/deep/directory/location/source_map.js.map

@@ -1 +1 @@
-var n={n:function(n){n++},o:function(){},t:function(){}},o=function(){},t=function(){};
+var n={n:function(n){0},o:function(){},t:function(){}},o=function(){},t=function(){};

test/fixtures/expected/mangleprops.js

@@ -1 +1 @@
-var a=10;n.n(a);
+var m=10;n.n(m);