fix: allow react-docgen version 4.x and 5.x-beta in peer dependencies

Author: ZauberNerd

package.json

@@ -83,7 +83,7 @@
     "distribution/"
   ],
   "peerDependencies": {
-    "react-docgen": "^2.17.0 || ^3.0.0-beta"
+    "react-docgen": "^2.17.0 || ^3.0.0-beta || ^3.0.0 || ^4.0.0  || ^5.0.0-beta"
   },
   "devDependencies": {
     "ava": "0.25.0",