Fix phpstan constraint to < 0.11.17

see phpstan/phpstan#2532

Author: soyuka

composer.json

@@ -50,7 +50,7 @@
         "phpdocumentor/type-resolver": "^0.3 || ^0.4",
         "phpspec/prophecy": "^1.8",
         "phpstan/extension-installer": "^1.0",
-        "phpstan/phpstan": "^0.11.10",
+        "phpstan/phpstan": "^0.11.10 <0.11.17",
         "phpstan/phpstan-doctrine": "^0.11.5",
         "phpstan/phpstan-phpunit": "^0.11.2",
         "phpstan/phpstan-symfony": "^0.11.6",