Update dependencies to latest stable versions for security
- Updated guzzlehttp/guzzle to ^7.9
- Updated psr/log to ^3.0
- Updated phpunit/phpunit to ^10.5
- Updated squizlabs/php_codesniffer to ^3.11
- Updated monolog/monolog to ^3.8
- Updated dms/phpunit-arraysubset-asserts to ^0.5
These updates ensure the project uses the latest secure versions of its dependencies, addressing potential vulnerabilities like SSRF in older Guzzle versions and removing any compromised local vendor files if they existed. Tests were run and passed under the new versions.