Thank you for using PHPStan!

With the release of PHPStan 0.12, the primary Composer package used by most users, phpstan/phpstan, has switched to a PHAR file. It works the same way as phpstan-shim. The need for a separate PHAR distribution has ceased. Package phpstan/phpstan-shim is no longer needed.

You should upgrade to phpstan/phpstan 0.12 with the following steps:

1. In your composer.json, rewrite line with "phpstan/phpstan-shim" to "phpstan/phpstan": "^0.12".
2. Delete your composer.lock.
3. Delete vendor/phpstan directory.
4. Delete vendor/bin/phpstan and vendor/bin/phpstan.phar.
5. Run composer install.

If you have any problem upgrading, don't hesitate to describe your issue at: https://github.com/phpstan/phpstan/issues/new/choose