microRTPS: use package.version to compare FastRTPS lib versions

msg/templates/urtps/Subscriber.cpp.em

@@ -11,6 +11,7 @@
 @#  - ids (List) list of all RTPS msg ids
 @###############################################
 @{
+from packaging import version
 import genmsg.msgs
 
 from px_generate_uorb_topic_helper import * # this is in Tools/
@@ -90,7 +91,7 @@ bool @(topic)_Subscriber::init(uint8_t topic_ID, std::condition_variable* t_send
     // Create RTPSParticipant
     ParticipantAttributes PParam;
     PParam.rtps.builtin.domainId = 0; // MUST BE THE SAME AS IN THE PUBLISHER
-@[if fastrtps_version <= 1.8]@
+@[if version.parse(fastrtps_version) <= version.parse('1.8')]@
     PParam.rtps.builtin.leaseDuration = c_TimeInfinite;
 @[else]@
     PParam.rtps.builtin.discovery_config.leaseDuration = c_TimeInfinite;