chore(deps): update dependency node-sass to v4.13.1 [security] (#983)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

package.json

@@ -79,7 +79,7 @@
     "lint-staged": "9.4.2",
     "mocha": "6.2.1",
     "ncp": "2.0.0",
-    "node-sass": "4.13.0",
+    "node-sass": "4.13.1",
     "prettier": "2.1.2",
     "rimraf": "3.0.0",
     "rxjs": "6.5.3",