Handle pubsub error when subscribing to signalling topic

[prathamesh0]

Part of cerc-io/watcher-ts#409

• Handle pubsub error in webrtc-signal component start
  • We are calling pubsub.subscribe() in the start process of webrtc-signal component
  • When starting all the libp2p components, if pubsub.subscribe() call happens before the pubsub service has started, it throws an error; encountered when using gossipsub
  • Catch the corresponding error and retry after a short delay
• Upgrade npm go-libp2p package
  • Required as one of the binaries referenced in the post-install script of current version is no longer available on IPFS
• Use only the required muxer in the Go nodes for interop tests as JS nodes run into an error when testing for mplex muxer and both mplex and yamux are turned on the Go side