Bump rewriter from 5184f68 to 8256bfb (mit-plv#1421)

Bumps [rewriter](https://github.com/mit-plv/rewriter) from `5184f68` to `8256bfb`.
- [Release notes](https://github.com/mit-plv/rewriter/releases)
- [Commits](mit-plv/rewriter@5184f68...8256bfb)

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

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