build(deps-dev): bump the npm-dev group with 2 updates (#1584)

Bumps the npm-dev group with 2 updates: [lefthook](https://github.com/evilmartians/lefthook) and [postcss](https://github.com/postcss/postcss).


Updates `lefthook` from 2.1.6 to 2.1.8
- [Release notes](https://github.com/evilmartians/lefthook/releases)
- [Changelog](https://github.com/evilmartians/lefthook/blob/master/CHANGELOG.md)
- [Commits](evilmartians/lefthook@v2.1.6...v2.1.8)

Updates `postcss` from 8.5.14 to 8.5.15
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.14...8.5.15)

---
updated-dependencies:
- dependency-name: lefthook
  dependency-version: 2.1.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: npm-dev
- dependency-name: postcss
  dependency-version: 8.5.15
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: npm-dev
...

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

Author: dependabot[bot]

package-lock.json

@@ -111,8 +111,8 @@
     "eslint-plugin-unicorn": "^64.0.0",
     "eslint-plugin-wc": "^3.1.0",
     "globals": "^17.6.0",
-    "lefthook": "^2.1.6",
-    "postcss": "^8.5.14",
+    "lefthook": "^2.1.8",
+    "postcss": "^8.5.15",
     "postcss-custom-media": "^12.0.1",
     "postcss-loader": "^8.2.1",
     "postcss-mixins": "^12.1.2",