Update through2 to the latest version 🚀 (#22)

* fix(package): update through2 to version 3.0.0

* chore(package): update lockfile package-lock.json

Author: greenkeeper[bot]

package-lock.json

@@ -16,7 +16,7 @@
     "detect-indent": "^5.0.0",
     "js-beautify": "^1.8.8",
     "plugin-error": "^1.0.1",
-    "through2": "^2.0.3"
+    "through2": "^3.0.0"
   },
   "devDependencies": {
     "eslint": "^5.8.0",