build(deps-dev): bump eslint from 7.8.1 to 7.9.0

Bumps [eslint](https://github.com/eslint/eslint) from 7.8.1 to 7.9.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v7.8.1...v7.9.0)

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

package.json

@@ -21,7 +21,7 @@
     "chai-as-promised": "~7.1.1",
     "concurrently": "~5.3.0",
     "cross-env": "~7.0.0",
-    "eslint": "7.8.1",
+    "eslint": "7.9.0",
     "eslint-config-prettier": "6.11.0",
     "eslint-plugin-import": "2.22.0",
     "eslint-plugin-prettier": "3.1.4",