chore(package): update through2 to version 2.0.3

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -24,7 +24,7 @@
   "dependencies": {
     "gulp-util": "^3.0.7",
     "htmlhint": "^0.9.12",
-    "through2": "^2.0.1"
+    "through2": "^2.0.3"
   },
   "devDependencies": {
     "gulp": "^3.9.1",