Add changeset

Author: hsubox76

.changeset/slow-fishes-obey.md

@@ -0,0 +1,6 @@
+---
+'firebase': major
+'@firebase/auth': major
+---
+
+Remove `firebase/auth/react-native` entry point. The React Native bundle should be automatically picked up by React Native build tools which recognize the `react-native` fields in `package.json` (at the top level and in `exports`).