Switch to stable Composer packages

GwendolenLynch · GwendolenLynch · commit d34c885c9b0a · 2019-05-30T10:23:24.000+02:00
diff --git a/composer.json b/composer.json
@@ -9,8 +9,7 @@
             "email": "gawain.lynch@gmail.com"
         }
     ],
-    "minimum-stability": "beta",
-    "prefer-stable": true,
+    "minimum-stability": "stable",
     "require": {
         "php": "^7.2",
         "ext-intl": "*",
