Change "GPL-3.0+" to "GPL-3.0-or-later"

The "GPL-3.0+"-SPDX-license-identifier has been deprecated,
and was replaced with "GPL-3.0-or-later".

More information about that, is available in the
"Deprecated License Identifiers"-part of
https://spdx.org/licenses/ .

Part-of: <https://gitlab.gnome.org/World/Phosh/squeekboard/-/merge_requests/642>

src/actors/mod.rs

@@ -1,5 +1,5 @@
 /* Copyright (C) 2022 Purism SPC
- * SPDX-License-Identifier: GPL-3.0+
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 /*! Actors are parts of Squeekboard containing state independent from the main application state.

src/actors/popover.rs

@@ -1,5 +1,5 @@
 /* Copyright (C) 2022 Purism SPC
- * SPDX-License-Identifier: GPL-3.0+
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 /*! The popover is opened directly by the GTK surface,

src/animation.rs

@@ -1,5 +1,5 @@
 /* Copyright (C) 2020 Purism SPC
- * SPDX-License-Identifier: GPL-3.0+
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 /*! Animation details */

src/data/loading.rs

@@ -1,5 +1,5 @@
 /* Copyright (C) 2020-2021 Purism SPC
- * SPDX-License-Identifier: GPL-3.0+
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 /*! Loading layout files */

src/data/mod.rs

@@ -1,5 +1,5 @@
 /* Copyright (C) 2020-2021 Purism SPC
- * SPDX-License-Identifier: GPL-3.0+
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 /*! Combined module for dealing with layout files */

src/data/parsing.rs

@@ -1,5 +1,5 @@
 /* Copyright (C) 2020-2021 Purism SPC
- * SPDX-License-Identifier: GPL-3.0+
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 /*! Parsing of the data files containing layouts */

src/event_loop/driver.rs

@@ -1,5 +1,5 @@
 /* Copyright (C) 2021 Purism SPC
- * SPDX-License-Identifier: GPL-3.0+
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
  
 /*! This drives the loop from the `loop` module.

src/event_loop/mod.rs

@@ -1,5 +1,5 @@
 /* Copyright (C) 2021 Purism SPC
- * SPDX-License-Identifier: GPL-3.0+
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 /*! The loop abstraction for driving state changes.

src/main.rs

@@ -1,5 +1,5 @@
 /* Copyright (C) 2020,2022 Purism SPC
- * SPDX-License-Identifier: GPL-3.0+
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 /*! Glue for the main loop. */

src/outputs.rs

@@ -1,5 +1,5 @@
 /* Copyright (C) 2019-2022 Purism SPC
- * SPDX-License-Identifier: GPL-3.0+
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 /*! Managing Wayland outputs */

src/panel.rs

@@ -1,5 +1,5 @@
 /* Copyright (C) 2022 Purism SPC
- * SPDX-License-Identifier: GPL-3.0+
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 /*! Panel state management.

src/server-main.c

@@ -2,7 +2,7 @@
  * Copyright (C) 2010-2011 Daiki Ueno <ueno@unixuser.org>
  * Copyright (C) 2010-2011 Red Hat, Inc.
  * Copyright (C) 2018-2019 Purism SPC
- * SPDX-License-Identifier: GPL-3.0+
+ * SPDX-License-Identifier: GPL-3.0-or-later
  * Author: Guido Günther <agx@sigxcpu.org>
  *
  * This program is free software: you can redistribute it and/or modify

src/state.rs

@@ -1,5 +1,5 @@
 /* Copyright (C) 2021,2022 Purism SPC
- * SPDX-License-Identifier: GPL-3.0+
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 /*! Application-wide state is stored here.