fs.copyTree does not copy a large amount of files

[eGavr]

Hi!

I have dir 1 which contains more than 500 files (png, svg), I'm trying to copy them into dir 2 using method copyTree:

var qfs = require('q-io/fs`);

qfs.copyTree('./1', './2').done();

I've discovered that the above shown script copies only a part of files from dir 1 and finishes silently :(

[kriskowal]

A PR with a fix and a test would be quite welcome. My apologies for lacking the time to investigate this personally.