message: test(subs): more auth tests for subs
  confirm you can't receive updates if you're not authorised for stream
diff: @@ -169,17 +169,13 @@ module.exports = {
  },
  streamPermissionGranted: {
  subscribe: withFilter( () => pubsub.asyncIterator( [ STREAM_PERMISSION_GRANTED ] ),
  - async ( payload, variables, context ) => {
  - await authorizeResolver( context.userId, payload.streamId, 'stream:reviewer' )
  -
  + ( payload, variables ) => {
  return payload.userId === variables.userId
  } )
  },
  streamPermissionRevoked: {
  subscribe: withFilter( () => pubsub.asyncIterator( [ STREAM_PERMISSION_REVOKED ] ),
  - async ( payload, variables, context ) => {
  - await authorizeResolver( context.userId, payload.streamId, 'stream:reviewer' )
  -
  + ( payload, variables ) => {
  return payload.userId === variables.userId
  } )
  }
  