Custom blocks example typing improvements (#202)

* improve typings

* add tests for types

---------

Co-authored-by: Matthew Lipski <[email protected]>

Author: YousefED

examples/editor/package.json

@@ -20,7 +20,7 @@
     "@vitejs/plugin-react": "^3.1.0",
     "eslint": "^8.10.0",
     "eslint-config-react-app": "^7.0.0",
-    "typescript": "^4.5.4",
+    "typescript": "^5.0.4",
     "vite": "^4.1.2",
     "vite-plugin-eslint": "^1.8.1"
   },

examples/vanilla/package.json

@@ -14,7 +14,7 @@
   "devDependencies": {
     "eslint": "^8.10.0",
     "eslint-config-react-app": "^7.0.0",
-    "typescript": "^4.5.4",
+    "typescript": "^5.0.4",
     "vite": "^4.1.2",
     "vite-plugin-eslint": "^1.8.1"
   },