Bump node-sass from 5.0.0 to 6.0.0

Bumps [node-sass](https://github.com/sass/node-sass) from 5.0.0 to 6.0.0.
- [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/v5.0.0...v6.0.0)

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

package.json

@@ -37,7 +37,7 @@
     "lodash.template": "^4.5.0",
     "micromatch": "^4.0.4",
     "mixin-deep": "^2.0.1",
-    "node-sass": "^5.0.0",
+    "node-sass": "^6.0.0",
     "regenerator-runtime": "^0.13.7",
     "set-value": "^4.0.0"
   },

yarn.lock

@@ -5253,10 +5253,10 @@ node-sass@^4.8.3:
     stdout-stream "^1.4.0"
     "true-case-path" "^1.0.2"
 
-node-sass@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/node-sass/-/node-sass-5.0.0.tgz#4e8f39fbef3bac8d2dc72ebe3b539711883a78d2"
-  integrity sha512-opNgmlu83ZCF792U281Ry7tak9IbVC+AKnXGovcQ8LG8wFaJv6cLnRlc6DIHlmNxWEexB5bZxi9SZ9JyUuOYjw==
+node-sass@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/node-sass/-/node-sass-6.0.0.tgz#f30da3e858ad47bfd138bc0e0c6f924ed2f734af"
+  integrity sha512-GDzDmNgWNc9GNzTcSLTi6DU6mzSPupVJoStIi7cF3GjwSE9q1cVakbvAAVSt59vzUjV9JJoSZFKoo9krbjKd2g==
   dependencies:
     async-foreach "^0.1.3"
     chalk "^1.1.1"