Update to latest uglify-js@1 from npm

This removed an old bundled version of UglifyJS and updates to the latest
version in uglify-js@1 branch from npm.

Line numbers are fixed in uglify-js itself, so this.line++; hack was removed.

Closes: #3
Closes: #5

Author: ChALkeR

gulpfile.js

@@ -9,7 +9,7 @@ const iife = require('gulp-iife');
 
 const sources = [
   'src/header.js',
-  'src/parse-js.js',
+  'node_modules/uglify-js/lib/parse-js.js',
   'src/api.js',
 ];
 

package.json

@@ -16,7 +16,8 @@
     "gulp-uglify": "^1.5.2",
     "istanbul": "^0.4.3",
     "tap-spec": "^4.1.1",
-    "tape": "^4.5.1"
+    "tape": "^4.5.1",
+    "uglify-js": "^1.3.5"
   },
   "scripts": {
     "test": "gulp build; tape ./tests/tape.js",

src/api.js

@@ -72,7 +72,6 @@ function clone(obj){
 
 function QMLParseError(message, line, col, pos, comment) {
         JS_Parse_Error.call(this, message, line, col, pos);
-        this.line++;
         this.comment = comment ? comment : "";
         this.message += " (line: " + this.line + ", col: " + col + ", pos: " + pos + ")" + "\n" + comment + "\n";
         this.file = qmlweb_parse.nowParsingFile;