Bump eslint from 5.6.1 to 5.9.0

Bumps [eslint](https://github.com/eslint/eslint) from 5.6.1 to 5.9.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v5.6.1...v5.9.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support

package-lock.json

@@ -113,7 +113,7 @@
 		"coveralls": "^3.0.1",
 		"cross-env": "^5.1.1",
 		"docdash": "^1.0.0",
-		"eslint": "^5.0.1",
+		"eslint": "^5.9.0",
 		"eslint-config-google": "^0.10.0",
 		"execa": "^1.0.0",
 		"jsdoc": "^3.5.5",