Upgrade dev ember-source to 5.1 so that we can use the built in native types

Author: NullVoxPopuli

ember-element-helper/package.json

@@ -77,7 +77,7 @@
     "@typescript-eslint/eslint-plugin": "^5.62.0",
     "@typescript-eslint/parser": "^5.62.0",
     "concurrently": "8.2.2",
-    "ember-source": "~4.12.3",
+    "ember-source": "~5.1.0",
     "eslint": "^8.56.0",
     "eslint-config-prettier": "9.1.0",
     "eslint-plugin-decorator-position": "^5.0.2",

ember-element-helper/tsconfig.json

@@ -15,10 +15,11 @@
       ]
     },
     // for typescript < 5
-    "moduleResolution": "NodeNext"
+    "moduleResolution": "NodeNext",
+    "types": ["ember-source/types"]
   },
   "include": [
     "src/**/*",
     "types/**/*"
   ]
-}
+}