Log message.attachments on send

[CristianPQ]

Right now only the text is being logged on MBFEvent.BotMessage, so, if the the message contains any attachment it's not being logged any data of them.
It would be nice at least to know that it has attachments, and some indicator of each one of them.

send: (message, next) => {
    try {
        if (message.type == "message") {
            let item = {
                text: message.text,
                type: message.type
            };
            if(message.attachments) {
                item.attachments = item.attachments.map((val) => (val.contentType))
            }
            this.logEvent(message, events_1.default.BotMessage.name, item);
        }
    }
    catch (e) {
    }
    finally {
        next();
    }
}

Something like that would be enough to avoid log to much data.

[morsh]

@CristianPQ - I agree, but it might take some time to add / test this. If you PR it, I'll review it quickly.