Version 0.5.0

• Add support for Crawler test assertions
• Add the PantherTestCase::createAdditionalPantherClient() to retrieve additional isolated browsers, useful to test applications using Mercure or WebSocket
• Improved support for non-standard web server directories
• Allow the integrated web server to start even if the homepage doesn't return a 200 HTTP status code
• Increase default timeouts from 5 seconds to 30 seconds
• Improve error messages
• Add compatibility with Symfony 4.3
• Upgrade ChromeDriver to version 76.0.3809.68
• Various quality improvements