fix

composer.json

@@ -6,7 +6,7 @@
     "minimum-stability": "dev",
     "require":{
         "util/distribute-helper": "dev-master",
-        "sdk/qt512-mingw-x64": "1.0"
+        "sdk/qt512-mingwx64": "1.0"
     },
     "repositories": {
         "packagist": {