Bump eslint from 4.6.1 to 4.19.1 in /responsive-web-design

Bumps [eslint](https://github.com/eslint/eslint) from 4.6.1 to 4.19.1.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v4.6.1...v4.19.1)

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

Author: dependabot[bot]

responsive-web-design/package.json

@@ -26,7 +26,7 @@
   "devDependencies": {
     "babel-eslint": "8.0.0",
     "cross-env": "5.0.5",
-    "eslint": "4.6.1",
+    "eslint": "4.19.1",
     "eslint-config-standard": "10.2.1",
     "eslint-loader": "1.9.0",
     "eslint-plugin-html": "3.2.1",