Add broker_version_requirements with versions 3.7.0 and 3.8.0

Author: lukebakken

Makefile

@@ -2,7 +2,7 @@ PROJECT = rabbitmq_routing_node_stamp
 PROJECT_DESCRIPTION = Stamps a message with the name of the RabbitMQ node that accepted it from the client
 
 define PROJECT_APP_EXTRA_KEYS
-	{broker_version_requirements, [ "3.7.0"]}
+	{broker_version_requirements, ["3.7.0", "3.8.0"]}
 endef
 
 DEPS = rabbit_common rabbit