chore(deps): update dependency @zeit/next-css to v1 (#649)

Co-authored-by: Renovate Bot <[email protected]>

Author: 2 people

tests/integration/package.json

@@ -10,7 +10,7 @@
     "start": "next start"
   },
   "dependencies": {
-    "@zeit/next-css": "0.1.5",
+    "@zeit/next-css": "1.0.1",
     "next": "5.1.0",
     "react": "16.12.0",
     "react-dom": "16.3.2"