Bump rewriter from 2315c27 to 19f344b

Bumps [rewriter](https://github.com/mit-plv/rewriter) from `2315c27` to `19f344b`.
- [Release notes](https://github.com/mit-plv/rewriter/releases)
- [Commits](mit-plv/rewriter@2315c27...19f344b)

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

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