Merge branch refs/heads/1.12.x into 2.1.x

Author: phpstan-bot

README.md

@@ -7,7 +7,6 @@
 
 This repository (`phpstan/phpstan-src`) is for PHPStan's development only. Head to [`phpstan/phpstan`](https://github.com/phpstan/phpstan) for the main README, or to [create an issue](https://github.com/phpstan/phpstan/issues/new/choose).
 
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 ## Contributing
 
 Any contributions are welcome.