Bump eslint from 6.8.0 to 7.4.0

Bumps [eslint](https://github.com/eslint/eslint) from 6.8.0 to 7.4.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v6.8.0...v7.4.0)

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

package.json

@@ -37,7 +37,7 @@
     "babel-plugin-dynamic-import-node": "^2.3.0",
     "codecov": "^3.6.5",
     "doctoc": "^1.4.0",
-    "eslint": "^6.8.0",
+    "eslint": "^7.4.0",
     "eslint-plugin-jest": "^23.8.2",
     "jest": "^26.0.1",
     "live-server": "^1.2.1",