lib/meson: Add version to the shared library

This is a very early release likely to change in the future, make sure
to use library versioning.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>

lib/meson.build

@@ -2,4 +2,5 @@ libxcvt_sources = ['libxcvt.c']
 libxcvt = shared_library('xcvt',
                          libxcvt_sources,
                          include_directories : inc,
+                         version: meson.project_version(),
                          install : true)