- new upstream version 6.4.0
* child_process, cluster: Forked child processes and cluster
workers now support stdio configuration.
* child_process: argv[0] can now be set to arbitrary values in
spawned processes.
* fs: fs.ReadStream now exposes the number of bytes it has read
* repl: The REPL now supports editor mode.
* util: inspect() can now be configured globally using
util.inspect.defaultOptions