Update composer.json

Author: TheTechsTech

composer.json

@@ -32,7 +32,7 @@
     "scripts": {
         "test": "phpunit --bootstrap vendor/autoload.php tests"
     },
-    "minimum-stability": "dev",
+    "minimum-stability": "stable",
     "extra": {
         "branch-alias": {
             "dev-master": "3.1-dev"