fix headers

Author: tanner0101

Sources/APNSwift/APNSwiftConnection.swift

@@ -2,7 +2,7 @@
 //
 // This source file is part of the APNSwift open source project
 //
-// Copyright (c) 2019-2020 the APNSwift project authors
+// Copyright (c) 2019 the APNSwift project authors
 // Licensed under Apache License v2.0
 //
 // See LICENSE.txt for license information

Sources/APNSwift/Deprecations.swift

@@ -1,3 +1,17 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the APNSwift open source project
+//
+// Copyright (c) 2020 the APNSwift project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of APNSwift project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
 extension APNSwiftPayload {
     @available(*, deprecated, renamed: "APNSwiftAlert")
     public typealias APNSwiftAlert = APNSwift.APNSwiftAlert