Update dependency hash-obj to v5

Author: renovate[bot]

package.json

@@ -27,7 +27,7 @@
     "test:ember": "ember test"
   },
   "dependencies": {
-    "hash-obj": "^3.0.0"
+    "hash-obj": "^5.0.0"
   },
   "devDependencies": {
     "@ember/optional-features": "2.0.0",