chore(deps): bump next from 9.5.5 to 12.1.0

Bumps [next](https://github.com/vercel/next.js) from 9.5.5 to 12.1.0.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v9.5.5...v12.1.0)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:production
...

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

app/package.json

@@ -11,7 +11,7 @@
     "@moltin/request": "2.0.2",
     "@zeit/next-css": "1.0.1",
     "final-form": "4.20.6",
-    "next": "9.5.5",
+    "next": "12.1.0",
     "react": "16.14.0",
     "react-dom": "16.14.0",
     "react-final-form": "6.5.8",