Updated YAML component.

composer.json

@@ -22,7 +22,7 @@
         "pear/validate_ispn": "dev-master",
         "phing/phing": "2.15.2",
         "serialssolutions/summon": "1.0.0",
-        "symfony/yaml": "2.7.6",
+        "symfony/yaml": "3.2.2",
         "swagger-api/swagger-ui": "2.2.10",
         "vufind-org/vufindcode": "1.0.3",
         "vufind-org/vufindharvest": "2.2.0",