Add ember-cli-update and some additional dependencies

package.json

@@ -39,6 +39,7 @@
     "ember-cli-sri": "^2.1.1",
     "ember-cli-string-helpers": "^5.0.0",
     "ember-cli-uglify": "^3.0.0",
+    "ember-cli-update": "^0.54.6",
     "ember-data": "~3.20.0",
     "ember-export-application-global": "^2.0.1",
     "ember-fetch": "^8.0.1",
@@ -62,5 +63,9 @@
   },
   "ember": {
     "edition": "octane"
+  },
+  "dependencies": {
+    "bufferutil": "^4.0.1",
+    "utf-8-validate": "^5.0.2"
   }
 }