The following merged WebRTC 1.0 PRs may relate to ORTC as well:

w3c/webrtc-pc#1350 (case sensitivity of RID characters)
w3c/webrtc-pc#1329 (update maxbitrate definition)
w3c/webrtc-pc#1226 (remove webidl defaults for RTP parameters)
w3c/webrtc-pc#1225 (units for maxframerate)
w3c/webrtc-pc#1109 (ptime member of RTCRtpEncodingParameters)