Bump eslint from 7.7.0 to 7.8.1

Bumps [eslint](https://github.com/eslint/eslint) from 7.7.0 to 7.8.1.
- [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/v7.7.0...v7.8.1)

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

package.json

@@ -50,7 +50,7 @@
     "@typescript-eslint/parser": "^3.10.1",
     "chai": "^4.2.0",
     "deep-equal": "^2.0.3",
-    "eslint": "^7.7.0",
+    "eslint": "^7.8.1",
     "express": "^4.17.1",
     "express-ws": "^4.0.0",
     "glob": "^7.0.5",