Version 13.6.0

### 13.6.0
-   Changes
    - General: Update to Firebase C++ SDK version 13.3.0.
    - General (Android): Update to Firebase Android BoM version 34.6.0.
    - General (iOS): Update to Firebase Cocoapods version 12.6.0.
    - Analytics: Added `SetDefaultEventParameters()` which allows developers to
      specify a list  of parameters that will be set on every event logged.
    - Analytics: Added a new `LogEvent()` that take in a IEnumerable of
      parameters.
    - Firebase AI: Added support for using
      [Server Prompt Templates](https://firebase.google.com/docs/ai-logic/server-prompt-templates/get-started).