chore(package): update add-asset-html-webpack-plugin to version 3.1.2

Closes #573

Author: greenkeeper[bot]

package.json

@@ -120,7 +120,7 @@
     "@types/source-map": "0.5.2",
     "@types/uglify-js": "2.6.29",
     "@types/webpack": "3.0.14",
-    "add-asset-html-webpack-plugin": "^2.0.1",
+    "add-asset-html-webpack-plugin": "^3.1.2",
     "angular2-template-loader": "0.6.0",
     "assets-webpack-plugin": "^3.5.1",
     "awesome-typescript-loader": "~3.2.1",