Bump eslint from 6.3.0 to 6.4.0

Bumps [eslint](https://github.com/eslint/eslint) from 6.3.0 to 6.4.0.
- [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/v6.3.0...v6.4.0)

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

package.json

@@ -18,7 +18,7 @@
     "electron-installer-snap": "^4.0.0",
     "electron-notarize": "^0.1.1",
     "electron-rebuild": "^1.8.5",
-    "eslint": "^6.3.0",
+    "eslint": "^6.4.0",
     "file-loader": "^4.1.0",
     "graceful-fs": "^4.2.2",
     "html-loader": "0.5.5",