chore(deps-dev): bump cssnano from 7.1.4 to 7.1.5

Bumps [cssnano](https://github.com/cssnano/cssnano) from 7.1.4 to 7.1.5.
- [Release notes](https://github.com/cssnano/cssnano/releases)
- [Commits](https://github.com/cssnano/cssnano/compare/cssnano@7.1.4...cssnano@7.1.5)

---
updated-dependencies:
- dependency-name: cssnano
  dependency-version: 7.1.5
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -45,7 +45,7 @@
     "baseline-browser-mapping": "^2.10.18",
     "browserify": "^17.0.1",
     "chokidar": "^5.0.0",
-    "cssnano": "^7.1.4",
+    "cssnano": "^7.1.5",
     "fancy-log": "^2.0.0",
     "gulp": "^5.0.1",
     "gulp-concat": "^2.6.1",