THRIFT-4546: Fix broken packagist.org

Update composer to fix broken packagist.org imports
diff --git a/composer.json b/composer.json
index d937bc7..0f22b76 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
     "minimum-stability": "dev",
     "extra": {
         "branch-alias": {
-            "dev-master": "0.10.0"
+            "dev-master": "1.0.x-dev"
         }
     }
 }