chore(deps-dev): bump cssnano from 5.0.3 to 5.0.4

Bumps [cssnano](https://github.com/cssnano/cssnano) from 5.0.3 to 5.0.4.
- [Release notes](https://github.com/cssnano/cssnano/releases)
- [Commits](https://github.com/cssnano/cssnano/compare/cssnano@5.0.3...cssnano@5.0.4)

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

package.json

@@ -121,7 +121,7 @@
     "cors": "^2.8.5",
     "cross-env": "=7.0.3",
     "css-loader": "=5.2.6",
-    "cssnano": "=5.0.3",
+    "cssnano": "=5.0.4",
     "cypress": "^6.7.1",
     "dedent": "^0.7.0",
     "deepmerge": "^4.0.0",