Promises of moves of files or directories with rename, falling back to recursive rename/copy on EXDEV errors, with configurable concurrency and win32 junction support.

If you `move` across devices or on filesystems that don't support renaming large directories. That is, situations that result in `rename` returning the `EXDEV` error, then `move` will fallback to copy + delete.

Node.js is an event-based server-side JavaScript engine.