Bump rewriter from e2721fc to d7d5681

Bumps [rewriter](https://github.com/mit-plv/rewriter) from `e2721fc` to `d7d5681`.
- [Release notes](https://github.com/mit-plv/rewriter/releases)
- [Commits](mit-plv/rewriter@e2721fc...d7d5681)

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

Signed-off-by: dependabot[bot] <[email protected]>