Fix internal errors

Merge pull request phpstan#45 from phpstan/commands

Console commands

Merge pull request phpstan#44 from enumag/feature/messenger

Add EnvelopeReturnTypeExtension for symfony/messenger

Fixed forward compatibility with PHPStan 0.11.3

Merge pull request phpstan#33 from keichinger/updated-servicesubscrib…

…erinterface

Honor new contracts namespace as-of Symfony 4.2 for ServiceSubscriberInterface

Fixed extension.neon