Push Notifications mediator message failure on iOS after Credo updates

[bryce-mcmath]

Description

Since the Credo updates we now see error logs related to push notifications on iOS, like the following:

PushNotificationsFcmSetDeviceInfoMessage: Failed to validate class.\nAn instance of PushNotificationsFcmSetDeviceInfoMessage has failed the validation:\n - property devicePlatform has failed the following constraints: devicePlatform must be a string \n

devicePlatform doesn't appear in the wallet codebase anywhere so I'm not yet sure what's causing the issue.

Worth checking with the mediator team to see if they updated any dependencies recently.

[bryce-mcmath]

The issue has been fixed and push notifications are working again, but there is still some error logs related to validation of the response summarized in the below ticket:
#1976