js-ipfs 0.33.0 and above do not work well with yjs "y-ipfs-connector"

[mccoysc]

js-ipfs 0.33.0 and above do not work well with yjs "y-ipfs-connector".
i found that after yjs init ok,the "await ipfs.pubsub.ls()" would list an empty topic array....this is not in normal state....it means "y-ipfs-connector" subscribe nothing from ipfs, so it will receive nothing from ipfs

[mccoysc]

I suggest that y-ipfs-connector should remove the dpendcy of ipfs-pubsub-room.
and then,require the user supply some callback functins in init options like 'onSubscribe' for subscribe a topic and 'onMessage' for indicating an incoming message and 'sendMessage' for sending a meassage out and so on