build(deps-dev): Bump eslint from 6.5.1 to 6.6.0 (#1809)

Bumps [eslint](https://github.com/eslint/eslint) from 6.5.1 to 6.6.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v6.5.1...v6.6.0)

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

package.json

@@ -22,7 +22,7 @@
     "chai-as-promised": "^7.1.1",
     "concurrently": "^5.0.0",
     "cross-env": "^6.0.0",
-    "eslint": "~6.5.1",
+    "eslint": "~6.6.0",
     "eslint-config-prettier": "~6.4.0",
     "eslint-plugin-import": "~2.18.2",
     "eslint-plugin-prettier": "~3.1.0",