fix transformChild bug and version bump @1.0.6

Author: Graham Butler

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@author.io/element-control",
-  "version": "1.0.5",
+  "version": "1.0.6",
   "description": "author-control custom element (web component).",
   "main": "dist/author-control.min.js",
   "scripts": {

src/element.js

@@ -232,7 +232,15 @@ class AuthorFormControlElement extends AuthorBaseElement(HTMLElement) {
     })
 
     this.UTIL.monitorChildren((mutations, observer) => {
-      let filtered = mutations.filter(record => record.addedNodes.item(0).nodeType !== 3)
+      let filtered = mutations.filter(record => {
+        let node = record.addedNodes.item(0)
+
+        if (!node) {
+          return false
+        }
+
+        return node.nodeType !== 3
+      })
 
       filtered.forEach((record, index, array) => {
         let node = record.addedNodes.item(0)