Added

• PHPStan in dev dependencies
• Additional build checks (PHPStan and PHP-CS)
• Automatic SVG badge generation for code coverage

Fixed

• Made GuzzleRetryMiddleware::__construct method final
• $options parameter comments PHPStan was complaining about
• shouldRetryHttpResponse values assume that the $response parameter is not null
• Ensure date $dateFormat is never NULL or empty string in deriveTimeoutFromHeader
• Additional cleanup based on PHPStan report

Removed

• Build dependency on scrutinizer.org service