Bump eslint from 7.20.0 to 7.21.0 (#62)

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](https://github.com/eslint/eslint/compare/v7.20.0...v7.21.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

web/package.json

@@ -36,7 +36,7 @@
     "@types/react-linkify": "^1.0.0",
     "@typescript-eslint/eslint-plugin": "^4.15.2",
     "@typescript-eslint/parser": "^4.15.2",
-    "eslint": "^7.20.0",
+    "eslint": "^7.21.0",
     "eslint-config-airbnb": "^18.2.1",
     "eslint-config-prettier": "^7.2.0",
     "eslint-plugin-import": "^2.22.1",