chore: update dependency react-docgen to v5.2.1

Author: renovate-bot

package-lock.json

@@ -102,7 +102,7 @@
     "eslint-plugin-prettier": "3.1.2",
     "flow-bin": "0.118.0",
     "prettier": "1.19.1",
-    "react-docgen": "5.2.0",
+    "react-docgen": "5.2.1",
     "rimraf": "3.0.2",
     "test-all-versions": "4.1.1"
   },