Add node-sass dependency

Author: fillaa

packages/react-scripts/package.json

@@ -36,6 +36,7 @@
     "fs-extra": "3.0.1",
     "html-webpack-plugin": "2.29.0",
     "jest": "22.4.2",
+    "node-sass": "^4.9.2",
     "object-assign": "4.1.1",
     "postcss-flexbugs-fixes": "3.2.0",
     "postcss-loader": "2.0.8",