Update dependencies

fixes issues/issues/47 (#76)

Author: prisis

composer.json

@@ -28,7 +28,7 @@
     "require-dev": {
         "phpunit/phpunit":         "^4.0 || ^5.1",
         "mockery/mockery":         "^0.9",
-        "cache/array-adapter":     "@stable",
+        "cache/array-adapter":     "^0.4",
         "cache/integration-tests": "^0.10"
     },
     "autoload":    {