Upgrade PHPStan to v0.11

phpstan.neon

@@ -2,8 +2,8 @@ parameters:
     reportUnmatchedIgnoredErrors: false
 
     ignoreErrors:
-        - '/Cannot access offset 0 on callable\./'
-        - '/Cannot access offset 1 on callable\./'
+        - '/Cannot access offset 0 on callable/'
+        - '/Cannot access offset 1 on callable/'
         - '/Cannot call method [a-zA-Z0-9]+\(\) on Symfony\\Component\\Config\\Definition\\Builder\\NodeParentInterface|null\./'
         - '/Method FriendsOfBehat\\SymfonyExtension\\Context\\Environment\\InitialisedContextServiceEnvironment::bindCallee\(\) should return callable/'
         - '/Strict comparison using === between 0\|1 and 2 will always evaluate to false\./'