Update as per #107

Author: mceachen

LICENSE.txt

@@ -1,13 +1,6 @@
-Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Upstream-Name: with_advisory_lock
-Upstream-Contact: [email protected], [email protected]
-Source: https://github.com/ClosureTree/with_advisory_lock
-
-Files: *
-Copyright: 2013 Matthew McEachen
-           2013-2025 Abdelkader Boudih
-
-License: MIT
+SPDX-License-Identifier: MIT
+SPDX-FileCopyrightText: 2013 Matthew McEachen 
+SPDX-FileCopyrightText: 2013-2025 Abdelkader Boudih
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the