Unable to log "error" objects using this transport

[dmiddlecamp]

For whatever reason, error objects in node ~10 don't have keys, causing the log function to reject them as metadata, I'm proposing a small change:

from:

    if  (meta && typeof meta === 'object' && Object.keys(meta).length === 0) {
        meta = false;
    }

to:

    if  (meta && typeof meta === 'object' && (Object.keys(meta).length === 0)
        && (!util.isError(meta)))
    {
        meta = false;
    }

I'll submit a PR shortly,

Thanks!
David

[dmiddlecamp]

oops, this was addressed in PR #44 ( #44 )