gstreamer-webrtc + FEC question: How to enable enum WebRTCFECType?

I'm currently running gstreamer-webrtc = { version = "0.16.5", features = ["v1_18"] }. I'm relatively new to feature juggling so sorry in advance if I'm missing something elementary.

I was experimenting with nack and FEC support and while trying to enable FEC I ended up having to copy/modify gstreamer-webrtc/src/auto/enums.rs because front-end enum WebRTCFECType requires old feature v1_14_1 which isn't an entry in gstreamer-webrtc's Cargo.toml.

Obviously this is generated code as well so if there's a not-me problem I imagine it's either upstream in the webrtc plugin itself or some config in the generation process.

Am I missing something easy, does some config line need its version rolled forward, or is FEC getting the axe? Glad to send a merge request if I can identify an easy fix. Pointers appreciated.