PHP fatal error when user passes an invalid filter

[rodrigoprimo]

Is your feature request related to a problem?

PHPCS throws a fatal error when the user passes an invalid filter:

$ bin/phpcs --filter=InvalidFilter .
PHP Fatal error:  Uncaught Error: Class "\PHP_CodeSniffer\Filters\InvalidFilter" not found in src/Files/FileList.php:90
Stack trace:
#0 src/Runner.php(402): PHP_CodeSniffer\Files\FileList->__construct()
#1 src/Runner.php(120): PHP_CodeSniffer\Runner->run()
#2 bin/phpcs(14): PHP_CodeSniffer\Runner->runPHPCS()
#3 {main}
  thrown in src/Files/FileList.php on line 90

Describe the solution you'd like

PHPCS should display a user-friendly error message informing the user that the filter does not exist and potentially list the available filters.

Additional context

Similar issue but for generators: #709.

While working on this issue, it is probably worth testing the other PHPCS CLI arguments to see if there are more arguments that cause a fatal error when passed invalid input and address them as well.

• I have read the Contribution Guidelines and this is not a support question.
• I intend to create a pull request to implement this feature.