Repl deprecation Warning with node 7.x

[perlawk]

When using the repl in iced-cs, just enter the following:
five -> 5
A warning:
DeprecationWarning: Calling an asynchronous function without callback is deprecated.
After tracing back the source code,
in src/repl.coffee:
fs.write fd, "#{code}\n"
It's a warning from node 7.x for async function without a callback,
patch:
fs.write fd, "#{code}\n", ()->
The warning disappear, I searched all the source under src directory, no more such bug, thanks.