Bump node-sass from 3.13.1 to 4.14.1

Bumps [node-sass](https://github.com/sass/node-sass) from 3.13.1 to 4.14.1.
- [Release notes](https://github.com/sass/node-sass/releases)
- [Changelog](https://github.com/sass/node-sass/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sass/node-sass/compare/v3.13.1...v4.14.1)
Signed-off-by: Ndependabot[bot] <support@github.com>

package.json

@@ -38,7 +38,7 @@
     "grunt-contrib-watch": "~0.5.3",
     "grunt-sass": "^1.1.0",
     "grunt-zip": "~0.7.0",
-    "node-sass": "^3.4.1"
+    "node-sass": "^4.14.1"
   },
   "license": "MIT"
 }