Modernize Symfony Configs

Symfony configuration is one of the changes that are difficult to spot until they're removed in the next major version. Then you must Google the "invalid option id error message" and hope for a solution. That doesn't sound like an excellent way to spend your weekend, does it? Symfony actually adds a deprecation message to those options, but they're not easy to spot. Today, we'll show you how to spot them with the help of Rector, PHPStan, and one other fantastic tool.