How to add mqtt5 properties using mosquittopp library?

[hatmaalla]

Hello,
I use the mosquittopp library and we need to be able to send mqttV5 properties during a publish operation.
Regarding the mosquittoccp implementation, we notice that the properties are hard-coded to NULL as developed here

mosquitto/lib/actions.c

Line 36 in 15292b2

return mosquitto_publish_v5(mosq, mid, topic, payloadlen, payload, qos, retain, NULL);

The question is, do we have a method for adding these properties or is this a limitation of using the mosquittopp library?

[DeuxVis]

Would be solved by Pull Request #2823

[DeuxVis]

Would be solved by Pull Request #2823

Now improved in #3010