Keycard library from this commit brings new changes in terms of
signals being sent by the lib in case of reader is not plugged in,
card is not inserted, card is inserted, that means the following
signals are sent only when it's really needed:
`"{\"type\":\"keycard.flow-result\",\"event\":{\"error\":\"connection-error\"}}"`
`"{\"type\":\"keycard.action.insert-card\",\"event\":{\"error\":\"connection-error\"}}"`
`"{\"type\":\"keycard.action.card-inserted\",\"event\":{}}"`
912cbe3b1d