Support TAGMSG as a message type

[vith]

Currently TAGMSG commands are not emitted through the 'message' event and do not get a .reply() method added to the event object.

irc-framework/src/client.js

Lines 177 to 188 in 759a85e

	if (['privmsg', 'notice', 'action'].indexOf(event_name) > -1) {
	event_arg.reply = function(message) {
	var dest = event_arg.target === client.user.nick ?
	event_arg.nick :
	event_arg.target;
	client.say(dest, message);
	};
	// These events with .reply() function are all messages. Emit it separately
	// TODO: Should this consider a notice a message?
	client.command_handler.emit('message', _.extend({type: event_name}, event_arg));

https://ircv3.net/specs/core/message-tags-3.3.html#the-tagmsg-tag-only-message