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Bumps [dlmalloc](https://github.com/alexcrichton/dlmalloc-rs) from 0.2.2 to 0.2.3.
- [Release notes](https://github.com/alexcrichton/dlmalloc-rs/releases)
- [Commits](https://github.com/alexcrichton/dlmalloc-rs/compare/0.2.2...0.2.3

)

---
updated-dependencies:
- dependency-name: dlmalloc
  dependency-type: direct:production
  update-type: version-update:semver-patch
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