Update phpstan/phpstan (#57)

composer.lock

@@ -2447,16 +2447,16 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "0.11.14",
+            "version": "0.11.15",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "b343bbf83d0dd08db917408d8efd99b140ce04c6"
+                "reference": "1be5b3a706db16ac472a4c40ec03cf4c810b118d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/b343bbf83d0dd08db917408d8efd99b140ce04c6",
-                "reference": "b343bbf83d0dd08db917408d8efd99b140ce04c6",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/1be5b3a706db16ac472a4c40ec03cf4c810b118d",
+                "reference": "1be5b3a706db16ac472a4c40ec03cf4c810b118d",
                 "shasum": ""
             },
             "require": {
@@ -2518,8 +2518,7 @@
                 "MIT"
             ],
             "description": "PHPStan - PHP Static Analysis Tool",
-            "time": "2019-08-17T12:49:22+00:00"
-
+            "time": "2019-08-18T20:51:53+00:00"
         },
         {
             "name": "symfony/console",