Bump eslint from 5.11.1 to 5.12.0

Bumps [eslint](https://github.com/eslint/eslint) from 5.11.1 to 5.12.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v5.11.1...v5.12.0)

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

package.json

@@ -98,7 +98,7 @@
  "ava": "^0.25.0",
  "cross-env": "^5.1.1",
  "docdash": "^1.0.2",
- "eslint": "^5.11.1",
+ "eslint": "^5.12.0",
  "eslint-config-google": "^0.11.0",
  "eslint-plugin-jsdoc": "^3.15.1",
  "jsdoc": "^3.5.5",