chore(deps): bump stylus from 0.56.0 to 0.57.0 (#87)

Bumps [stylus](https://github.com/stylus/stylus) from 0.56.0 to 0.57.0.
- [Release notes](https://github.com/stylus/stylus/releases)
- [Changelog](https://github.com/stylus/stylus/blob/dev/Changelog.md)
- [Commits](stylus/stylus@0.56.0...0.57.0)

---
updated-dependencies:
- dependency-name: stylus
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -29,7 +29,7 @@
   "license": "MIT",
   "dependencies": {
     "nib": "^1.1.2",
-    "stylus": "^0.56.0"
+    "stylus": "^0.57.0"
   },
   "devDependencies": {
     "chai": "^4.3.4",