new join config issue

[Manish]

What did you do?

https://github.com/pion/ion-sdk-go/blob/master/example/ion-sfu-load-tool/main.go#L46

if do a sub only, its doesn't receive any data. i.e its not subscribing
if i pass do

c.Join(new_session, nil)

it works

[adwpc]

pls try new version.