Bump eslint from 6.8.0 to 7.3.1

Bumps [eslint](https://github.com/eslint/eslint) from 6.8.0 to 7.3.1.
- [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/v6.8.0...v7.3.1)

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

package.json

@@ -47,7 +47,7 @@
     "copy-webpack-plugin": "^6.0.2",
     "copyfiles": "^2.3.0",
     "css-loader": "^3.5.3",
-    "eslint": "^6.8.0",
+    "eslint": "^7.3.1",
     "eslint-config-prettier": "^6.11.0",
     "eslint-plugin-jest": "^23.13.2",
     "eslint-plugin-prettier": "^3.1.3",