build: bump version to 2.4.108

Signed-off-by: Simon Ser <contact@emersion.fr>
diff --git a/meson.build b/meson.build
index 7ccfe84..60f7c2f 100644
--- a/meson.build
+++ b/meson.build
@@ -21,7 +21,7 @@
 project(
   'libdrm',
   ['c'],
-  version : '2.4.107',
+  version : '2.4.108',
   license : 'MIT',
   meson_version : '>= 0.46',
   default_options : ['buildtype=debugoptimized', 'c_std=gnu99'],