Bump memfs from 4.9.3 to 4.12.0 (#239)

Bumps [memfs](https://github.com/streamich/memfs) from 4.9.3 to 4.12.0.
- [Release notes](https://github.com/streamich/memfs/releases)
- [Changelog](https://github.com/streamich/memfs/blob/master/CHANGELOG.md)
- [Commits](streamich/memfs@v4.9.3...v4.12.0)

---
updated-dependencies:
- dependency-name: memfs
  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

@@ -15,7 +15,7 @@
     "clean-css": "^5.3.3",
     "cssesc": "^3.0.0",
     "dayjs": "^1.11.11",
-    "memfs": "^4.9.3",
+    "memfs": "^4.12.0",
     "moveto": "^1.8.2",
     "sass": "^1.77.8",
     "sharp": "^0.33.4",