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"]}"