Bump next from 7.0.2 to 11.1.0 in /functions

Bumps [next](https://github.com/vercel/next.js) from 7.0.2 to 11.1.0.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@7.0.2...v11.1.0)

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

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

Author: dependabot[bot]

functions/package.json

@@ -25,7 +25,7 @@
     "gm": "^1.23.0",
     "isomorphic-fetch": "^2.2.1",
     "lodash": "^4.17.19",
-    "next": "7.0.2",
+    "next": "11.1.0",
     "prop-types": "^15.6.2",
     "react": "^16.6.0",
     "react-dom": "^16.6.0",