Receiving punycode deprecation warning

[vcampitelli]

We've been receiving a deprecation warning when using the lib:

(node:478) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)

Even though this is not directly related to yarn, there's a good discussion here: https://github.com/yarnpkg/yarn/issues/9005