Update handlebars to the latest version 🚀 (josdejong#1660)

* chore(package): update handlebars to version 4.5.0

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

Author: greenkeeper[bot]

package-lock.json

@@ -141,7 +141,7 @@
     "glob": "7.1.5",
     "gulp": "4.0.2",
     "gulp-babel": "8.0.0",
-    "handlebars": "4.4.5",
+    "handlebars": "4.5.0",
     "istanbul": "0.4.5",
     "jsep": "0.3.4",
     "karma": "4.4.1",