Update algolia/algoliasearch-client-php requirement from ^2.6 to ^3.4

Updates the requirements on [algolia/algoliasearch-client-php](https://github.com/algolia/algoliasearch-client-php) to permit the latest version.
- [Release notes](https://github.com/algolia/algoliasearch-client-php/releases)
- [Changelog](https://github.com/algolia/algoliasearch-client-php/blob/master/CHANGELOG.md)
- [Commits](algolia/algoliasearch-client-php@2.6.0...3.4.0)

---
updated-dependencies:
- dependency-name: algolia/algoliasearch-client-php
  dependency-type: direct:production
...

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

Author: dependabot[bot]

composer.json

@@ -8,6 +8,6 @@
         }
     ],
     "require": {
-        "algolia/algoliasearch-client-php": "^2.6"
+        "algolia/algoliasearch-client-php": "^4.19"
     }
 }