Release matching version tags to PX4 firmware

[alvinsunyixiao]

Since the hardware can be running released firmware instead of master branch firmware, the message types/names could be different in different releases. It is quite dangerous to run micrortps_agent when there is a message type mismatch that can cause crashes.

Could you please consider adding release tags for this repo that matches the main flight control repository so that we have matching message definitions?

This is also related to #139