Openttd-protocol

What's Changed
* Add: application performance monitoring via Honeycomb by TrueBrain in https://github.com/OpenTTD/py-protocol/pull/20


**Full Changelog**: https://github.com/OpenTTD/py-protocol/compare/1.3.1...1.4.0

Fix

- [19](https://github.com/OpenTTD/py-protocol/pull/19) - Fix: better guard the process_queue() coroutine for exceptions (TrueBrain)

Add

- [18](https://github.com/OpenTTD/py-protocol/pull/18) - Add: support multiple branches for content listing (TrueBrain)

Fix

- [17](https://github.com/OpenTTD/py-protocol/pull/17) - Fix: content protocol didn't close a file download correctly (TrueBrain)

Add

- [16](https://github.com/OpenTTD/py-protocol/pull/16) - Add: support for SERVER_SHUTDOWN in Game protocol (TrueBrain)

Fix

- [15](https://github.com/OpenTTD/py-protocol/pull/15) - Fix: support for Game Coordinator protocol 6 on STUN and TURN server (TrueBrain)