Bump phpstan/phpstan from 0.11.19 to 0.11.20 Bumps [phpstan/phpstan](https://github.com/phpstan/phpstan) from 0.11.19 to 0.11.20. - [Release notes](https://github.com/phpstan/phpstan/releases) - [Commits](https://github.com/phpstan/phpstan/compare/0.11.19...0.11.20) Signed-off-by: dependabot[bot] <[email protected]>