About stylus error when running npm install

[L4Ph]

For reference, please refer to the following issue: stylus/stylus#2938

Currently, stylus is incorrectly banned from npm.

I could update the dependencies, but this would be more of a temporary workaround, so I prefer not to touch package.json.
If this issue persists past 23:59 on Friday this week in JST, I'll temporarily reference the git commit.
Until then, please refer to the issue yourself and resolve the dependency from git.

related issue: #557 #558 #561

[zlay0701]

The stylus package is accessible on npm now
https://www.npmjs.com/package/stylus
stylus/stylus#2938