Updates state with lists request status

@param  {Object} state  Current state
@param  {Object} action Action
@return {Object}        Updated state
function listsRequest( state = false, { type } ) {
	switch ( type ) {
		case WOOCOMMERCE_MAILCHIMP_LISTS_REQUEST:
		case WOOCOMMERCE_MAILCHIMP_LISTS_REQUEST_SUCCESS:
		case WOOCOMMERCE_MAILCHIMP_LISTS_REQUEST_FAILURE:
			return WOOCOMMERCE_MAILCHIMP_LISTS_REQUEST === type;
	}

	return state;
}