Bump knplabs/knp-snappy from 1.4.2 to 1.4.3

Bumps [knplabs/knp-snappy](https://github.com/KnpLabs/snappy) from 1.4.2 to 1.4.3.
- [Release notes](https://github.com/KnpLabs/snappy/releases)
- [Changelog](https://github.com/KnpLabs/snappy/blob/master/CHANGELOG.md)
- [Commits](KnpLabs/snappy@v1.4.2...v1.4.3)

---
updated-dependencies:
- dependency-name: knplabs/knp-snappy
  dependency-type: indirect
...

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