chore(deps): update dependency typedoc to v0.20.21

Author: renovate-bot

package.json

@@ -46,7 +46,7 @@
   "devDependencies": {
     "react": "16.13.1",
     "react-native": "0.63.0",
-    "typedoc": "0.18.0",
+    "typedoc": "0.20.21",
     "typescript": "3.9.7"
   }
 }