close websocket if send event type `close`
close websocket if send event type `close`

mlgruby/mining,chrisdamba/mining,AndrzejR/mining,mlgruby/mining,jgabriellima/mining,seagoat/mining,avelino/mining,mlgruby/mining,seagoat/mining,jgabriellima/mining,avelino/mining,AndrzejR/mining,mining/mining,chrisdamba/mining,mining/mining