Bump PHPStan version

Author: noximo

composer.json

@@ -30,7 +30,8 @@
   },
   "license": "MIT",
   "require-dev": {
-    "phpstan/phpstan": "^0.10",
+    "phpstan/phpstan": "^0.11",
+    "noximo/phpstan-fileoutput": "0.1.3",
     "noximo/dbgr": "dev-master"
   },
   "scripts": {