[ghex] build: Fix incorrect soname numbering

[Logan Rathbone <larathbone src gnome org>]

commit 35fa7f844366627c4273d069b266e0bf1ed4bb46
Author: Logan Rathbone <poprocks gmail com>
Date:   Tue Apr 19 21:57:18 2022 -0400

    build: Fix incorrect soname numbering
    
    Will only affect libgtkhex >= 4.0, so it probably won't be necessary to
    cherry-pick this for the ghex-42 branch.

 src/meson.build | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/meson.build b/src/meson.build
index 2007f20..8484274 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -39,7 +39,8 @@ lib_osx_version = [osx_current, '@0@.@1@'.format(osx_current, libgtkhex_version_
 libgtkhex = library(
   'gtkhex-@0@'.format(libgtkhex_api_version),
   libgtkhex_sources,
-  version: '0.@0@.@1@'.format(libgtkhex_version_major, libgtkhex_version_minor),
+  version: '@0@.@1@.@2@'.format(
+    libgtkhex_version_major, libgtkhex_version_minor, libgtkhex_version_micro),
   darwin_versions: lib_osx_version,
   include_directories: ghex_root_dir,
   dependencies: libgtkhex_deps,