Add Apache-2.0 headers to smithy-json

Author: nateprewitt

packages/smithy-json/tests/unit/__init__.py

@@ -1,3 +1,5 @@
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
 from dataclasses import dataclass
 from datetime import UTC, datetime
 from decimal import Decimal

packages/smithy-json/tests/unit/test_deserializers.py

@@ -1,3 +1,5 @@
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
 from datetime import datetime
 from decimal import Decimal
 from typing import Any

packages/smithy-json/tests/unit/test_serializers.py

@@ -1,3 +1,5 @@
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
 from datetime import datetime
 from decimal import Decimal
 from io import BytesIO