The STOMP version is hardcoded in the org.fusesource.stomp.client.Stomp class. Though the org.fusesource.stomp.client.Stomp class has setter method for version, the Camel-Stomp Component has not exposed that option to be set by the users.
Looks like StompEndpoint and StompConfiguration classes would need changes to allow users to set version.
STOMP 1.2 has been available for years and most of the message brokers support STOMP 1.2. In such scenarios it becomes a necessary feature for the camel-stomp to include the support for STOMP 1.2