Bump eslint from 7.20.0 to 7.21.0 (#45)

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)

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

package.json

@@ -30,7 +30,7 @@
     "@typescript-eslint/eslint-plugin": "^4.15.2",
     "@typescript-eslint/parser": "^4.15.2",
     "auto-changelog": "^2.2.1",
-    "eslint": "^7.20.0",
+    "eslint": "^7.21.0",
     "eslint-config-oceanprotocol": "^1.5.0",
     "eslint-config-prettier": "^8.1.0",
     "eslint-plugin-prettier": "^3.3.1",