chore: added release:beta script

Author: bang9

package.json

@@ -34,7 +34,8 @@
     "release": "release-it",
     "example": "yarn --cwd example",
     "bootstrap": "yarn example && yarn install && yarn example pods",
-    "clean": "del-cli android/build example/android/build example/android/app/build example/ios/build"
+    "clean": "del-cli android/build example/android/build example/android/app/build example/ios/build",
+    "release:beta": "release-it --preRelease=beta"
   },
   "keywords": [
     "react-native",