feat: Use custom HTTP Client, custom Logger, PHPStan

[tyiuhc]

Implementation of suggested enhancements.

Updates to support:

• Custom HTTP Client and Logger - set in RemoteEvaluationConfig, LocalEvaluationConfig, AssignmentConfig
  • HTTP Client (using interface instead of php-http/discovery for more flexibility)
    • Set via the httpClient property
    • The custom client will implement the HttpClientInterface
    • If a custom client is not provided, a default Guzzle-based client is used
      • The default client can be set via the guzzleClientConfig property
  • PSR Logger
    • Set via thelogger property
    • The log level is set via logLevel property
    • If a custom logger is not provided, a default error_log-based logger is used
• Internal implementation of MurmurHash3
• Improved testing to use PHPStan; test additional PHP versions
  • Majority of files changed are due to PHPStan style suggestions and not change in implementation

[adri]

Just checking, can this be merged? :) We'll use it in production soon and it would be nice to use an actual release.

[github-actions[bot]]

:tada: This PR is included in version 0.4.0 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket:

[tyiuhc]

@adri many thanks for the helpful comments, the changes have been merged into v0.4.0