update devDependencies

Author: Foxandxss

package.json

@@ -15,7 +15,7 @@
   "devDependencies": {
     "angular": "^1.4.3",
     "angular-mocks": "^1.4.3",
-    "del": "^1.1.1",
+    "del": "^2.0.2",
     "gulp": "^3.8.10",
     "gulp-angular-templatecache": "^1.5.0",
     "gulp-concat": "^2.4.3",