build(deps-dev): 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[bot] <support@github.com>

package.json

@@ -53,7 +53,7 @@
     "@commitlint/config-conventional": "^12.0.1",
     "@commitlint/prompt-cli": "^12.0.1",
     "babel-eslint": "^10.1.0",
-    "eslint": "^7.20.0",
+    "eslint": "^7.21.0",
     "eslint-config-prettier": "^8.1.0",
     "eslint-plugin-prettier": "^3.3.1",
     "husky": "^5.1.3",