chore(deps-dev): bump node-sass from 4.13.0 to 4.13.1

Bumps [node-sass](https://github.com/sass/node-sass) from 4.13.0 to 4.13.1.
- [Release notes](https://github.com/sass/node-sass/releases)
- [Changelog](https://github.com/sass/node-sass/blob/master/CHANGELOG.md)
- [Commits](sass/node-sass@v4.13.0...v4.13.1)

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

Author: dependabot[bot]

package-lock.json

@@ -85,7 +85,7 @@
     "husky": "^1.3.1",
     "lint-staged": "^8.1.5",
     "mini-css-extract-plugin": "^0.5.0",
-    "node-sass": "^4.13.0",
+    "node-sass": "^4.13.1",
     "postcss-loader": "^3.0.0",
     "prettier": "^1.17.1",
     "print-time-webpack": "^2.0.3",