This package is deprecated, as it was barely used and even little maintained. We've moved to more live and maintained package symplify/phpstan-rules to give it more love:
Flip packages:
composer remove rector/phpstan-rules
composer require symplify/phpstan-rules --devUpdate your phpstan.neon:
# phpstan.neon
- - vendor/rector/phpstan-rules/config/rector-rules.neon
+ - vendor/symplify/phpstan-rules/config/rector-rules.neonPHPStan rules for Rector and projects that maintain Rector rulesets.
composer require rector/phpstan-rules --dev