build(deps-dev): bump zircote/swagger-php from 5.7.0 to 5.7.3

Bumps [zircote/swagger-php](https://github.com/zircote/swagger-php) from 5.7.0 to 5.7.3.
- [Release notes](https://github.com/zircote/swagger-php/releases)
- [Commits](zircote/swagger-php@5.7.0...5.7.3)

---
updated-dependencies:
- dependency-name: zircote/swagger-php
  dependency-version: 5.7.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]