chore(deps-dev): bump cssnano from 7.0.7 to 7.1.0

Bumps [cssnano](https://github.com/cssnano/cssnano) from 7.0.7 to 7.1.0.
- [Release notes](https://github.com/cssnano/cssnano/releases)
- [Commits](https://github.com/cssnano/cssnano/compare/[email protected]@7.1.0)

---
updated-dependencies:
- dependency-name: cssnano
  dependency-version: 7.1.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -54,7 +54,7 @@
     "@wordpress/eslint-plugin": "^22.12.0",
     "@wordpress/scripts": "^27.9.0",
     "conventional-changelog-simple-preset": "^1.0.24",
-    "cssnano": "^7.0.7",
+    "cssnano": "^7.1.0",
     "eslint-config-wordpress": "^2.0.0",
     "filenamify": "^4.3.0",
     "grunt": "^1.6.1",