feat: increase peer dependency range for react-docgen to include v5

Author: ZauberNerd

package-lock.json

@@ -91,7 +91,7 @@
     "trailingComma": "es5"
   },
   "peerDependencies": {
-    "react-docgen": "^3.0.0 || ^4.0.0 || ^5.0.0-beta"
+    "react-docgen": "^3.0.0 || ^4.0.0 || ^5.0.0-beta || ^5.0.0"
   },
   "devDependencies": {
     "ava": "0.25.0",
@@ -108,7 +108,7 @@
     "eslint-plugin-prettier": "3.1.2",
     "flow-bin": "0.113.0",
     "prettier": "1.19.1",
-    "react-docgen": "3.0.0-beta12",
+    "react-docgen": "5.0.0",
     "rimraf": "2.7.1",
     "test-all-versions": "3.3.3"
   },