meson: Use SPDX identifier as license text

First it is recommended to use SPDX identifiers for the version field
and second it clarifies which LGPL version this project is using.

While at it, also use the SPDX identifier in the README.

Signed-off-by: Daniel Wagner <[email protected]>

Author: dwsuse

README.md

@@ -29,7 +29,8 @@ archived here:
 # License
 
 Except where otherwise stated, all software contained within this repo
-is currently licensed LGPL, see COPYING for more information.
+is currently licensed LGPL-2.1-or-later, see COPYING for more
+information.
 
 Keith Busch 2020-02-06
 

meson.build

@@ -9,7 +9,7 @@ project(
     'libnvme', ['c', 'cpp'],
     meson_version: '>= 0.47.0',
     version: '1.0',
-    license: 'LGPLv2+',
+    license: 'LGPL-2.1-or-later',
     default_options: [
         'c_std=gnu99',
         'warning_level=1',