Android
Upgrade an app from the v4 eclypses-aws-mte-relay-client-android artifact to mte-relay-client-android 5.3.0.
Flutter
Upgrade an app from the v4 mte_relay_client_plugin to the mte_relay 5.3.0 plugin.
iOS
Upgrade an app from the v4 MteRelay iOS package to Relay 5.3.0.