DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.

Not a big deal, yet, but I'm getting a deprecation warning when using this module:
```
(node:5180) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)
```