Features [twitch] add startDate to StreamOnline EventSub event (68281a2, #219) Fixes [twitch-chat-client] allow user names shorter than 4 characters (3752bf2, #221) [twitch-eventsub] drop messages without signature rather than crashing (bd9f552, #216) [twitch-eventsub] fix EventSubListener#unlisten (and EventSubSubscription#stop) waiting for confirmation forever (2f00945, #220)