Update Guzzle to stable

ddeboer · ddeboer · commit 5483a9bf0098 · 2015-05-26T21:07:45.000+02:00
diff --git a/composer.json b/composer.json
@@ -13,7 +13,7 @@
     "require": {
         "php": ">=5.4",
         "php-http/adapter-core": "dev-internal_separation",
-        "guzzlehttp/guzzle": "6.x-dev"
+        "guzzlehttp/guzzle": "~6.0"
     },
     "require-dev": {
         "ext-curl": "*",
