Update header
From Project to Author(s) for the catch-all. This file has my
copyright which is retained through the catch-all statement.
-// Copyright (c) OpenFaaS Project 2018. All rights reserved.
+// Copyright (c) OpenFaaS Author(s) 2018. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
package types
