change subscriptions to support RC 0.60
RC 0.60 seems to use a slightly more complex subscription message:
"{"msg":"sub","id":"As6sfXqH8zSQEBmYy","name":"stream-room-messages","params":["2kzae6pwXf2Dz9myNwX5We3gptsmuoYawz",{"useCollection":false,"args":[]}]}"
instead of
"{"msg":"sub","id":"As6sfXqH8zSQEBmYy","name":"stream-room-messages","params":["2kzae6pwXf2Dz9myNwX5We3gptsmuoYawz"]}"