build: Bump pusher/pusher-php-server from 7.2.3 to 7.2.4 (#3384)

Bumps [pusher/pusher-php-server](https://github.com/pusher/pusher-http-php) from 7.2.3 to 7.2.4.
- [Release notes](https://github.com/pusher/pusher-http-php/releases)
- [Changelog](https://github.com/pusher/pusher-http-php/blob/master/CHANGELOG.md)
- [Commits](pusher/pusher-http-php@7.2.3...7.2.4)

---
updated-dependencies:
- dependency-name: pusher/pusher-php-server
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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