chore(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

@@ -43,7 +43,7 @@
     "conventional-changelog-cli": "^2.1.1",
     "coveralls": "^3.1.0",
     "del-cli": "^3.0.1",
-    "eslint": "^7.20.0",
+    "eslint": "^7.21.0",
     "eslint-plugin-jest": "^24.1.5",
     "jest": "^26.6.3",
     "jest-puppeteer": "^4.4.0",