Fix gulpfile.js style issue

gulpfile.js

@@ -1,19 +1,17 @@
-var gulp = require('gulp')
-
-var shell = require('gulp-shell')
-var concat = require('gulp-concat')
-var uglify = require('gulp-uglify')
-var extReplace = require('gulp-ext-replace')
-var rename = require('gulp-rename')
-var istanbul = require('gulp-istanbul')
-var bump = require('gulp-bump')
-var tag_version = require('gulp-tag-version')
-
-var insert = require('gulp-insert')
-
+require('gulp')
+require('gulp-shell')
+require('gulp-concat')
+require('gulp-uglify')
+require('gulp-ext-replace')
+require('gulp-rename')
+require('gulp-istanbul')
+require('gulp-bump')
+require('gulp-tag-version')
+require('gulp-insert')
 var requireDir = require('require-dir')
-var tasks = requireDir('./gulp/tasks')
 
-var paths = {
-  scripts: ['./src/**/*.js', '!**/parser/*.js']
-}
+requireDir('./gulp/tasks')
+
+// var paths = {
+//   scripts: ['./src/**/*.js', '!**/parser/*.js']
+// }