Version 2.4.3

• Lazy-initialize callables in \Slim\Route::setCallable()
• Fix \Slim\Http\Util::parseCookie() for cookie values that contain "="
• Improved debug stack trace output
• Allow default values for \Slim\Http\Request::params()
• Fix X-Forwarded-For header detection
• Require phpunit as Composer dev dependency
• Improve controller method name detection in \Slim\Route::setCallable()
• Re-merge commits from a mistakenly-deleted earlier branch