Bump eslint from 7.20.0 to 7.21.0

Bumps [eslint](https://github.com/eslint/eslint) from 7.20.0 to 7.21.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v7.20.0...v7.21.0)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -59,7 +59,7 @@
     "chokidar": "^3.5.1",
     "cssnano": "^4.1.10",
     "esbuild": "^0.8.50",
-    "eslint": "^7.20.0",
+    "eslint": "^7.21.0",
     "eslint-plugin-eslint-comments": "^3.2.0",
     "eslint-plugin-import": "^2.22.1",
     "eslint-plugin-jsdoc": "^32.1.0",