v1.5.2

• Fix issue when downloadCallback wasn’t called if interceptDownload is presented
• unlink() method now supports “unlinking” by version (second argument)
• Better internal performance, should increase performance up to 25%. This update is avoid heavy FS operations, like rename/copy/append, all incoming chunks goes into writable stream. This will help to avoid unnecessary FS locks
• Security update: now default file permissions is 0644