Switch from node-sass to sass

facebook/create-react-app#9986

Author: mschroederi

package.json

@@ -45,7 +45,7 @@
     "husky": "^4.2.3",
     "jest-junit": "^10.0.0",
     "lint-staged": "^10.0.8",
-    "node-sass": "^5.0.0",
+    "sass": "^1.29.0",
     "prettier": "^1.19.1",
     "typescript": "3.8.2"
   },