chore(deps): update module pion/ion-sfu to v1.6.5

go.mod

@@ -7,15 +7,14 @@ require (
 	github.com/golang/protobuf v1.4.3
 	github.com/lucsky/cuid v1.0.2
 	github.com/pion/ion-log v1.0.0
-	github.com/pion/ion-sfu v1.5.1
+	github.com/pion/ion-sfu v1.6.5
 	github.com/pion/rtcp v1.2.6
 	github.com/pion/rtp v1.6.1
 	github.com/pion/transport v0.12.0
-	github.com/pion/webrtc/v3 v3.0.0-beta.14
+	github.com/pion/webrtc/v3 v3.0.0-beta.15.0.20201209023348-63401a8837fb
 	github.com/spf13/viper v1.7.1
 	github.com/stretchr/testify v1.6.1
 	github.com/xlab/libvpx-go v0.0.0-20200321114045-4c41f8a7acef
-	golang.org/x/exp v0.0.0-20201008143054-e3b2a7f2fdc7
 	google.golang.org/grpc v1.34.0
 	google.golang.org/protobuf v1.25.0
 )