puck.js - Improve long delay advertising

Well, a super-quick fix is to modify CONNECTION_TIMEOUT in EspruinoHub/lib/connect.js here: https://github.com/espruino/EspruinoHub/blob/master/lib/connect.js#L20

To be maybe just 1.

Now after writing to the Puck, disconnect will happen after 1 second.

So normally, changing light state should be almost instant, however if you click twice quickly then you'll be limited to roughly a 1 second delay on the second tap - which is probably ok?