chore(deps): update dependency typescript to v3.9.9

Author: renovate-bot

package.json

@@ -40,6 +40,6 @@
     "react": "16.9.0",
     "react-native": "0.61.5",
     "typedoc": "0.18.0",
-    "typescript": "3.9.7"
+    "typescript": "3.9.9"
   }
 }