Bump meson_version to fix a warning
WARNING: Project specifies a minimum meson_version '>= 0.48' but uses features which were added in newer versions:
* 0.54.0: {'native arg in add_languages'}
WARNING: Project specifies a minimum meson_version '>= 0.48' but uses features which were added in newer versions:
* 0.54.0: {'native arg in add_languages'}