Avoid turbo cache miss on root package change (#43309)
Since the `next-swc` package doesn't rely on any of the root
dependencies this normalizes the `package.json` to avoid cache misses
when the file changes.
x-ref:
https://github.com/vercel/next.js/actions/runs/3535337836/jobs/5933336967
x-ref:
https://github.com/vercel/next.js/actions/runs/3535337836/jobs/5933338363
x-ref: [slack
thread](https://vercel.slack.com/archives/C02HEJASXGD/p1669236151437999)
