gitmodules: Update libnkutils

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
gitmodules: Update libnkutils

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
libj4status-plugin/config: Add enum parsing API

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
libj4status-plugin: Add actions parsing API

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
gitmodules: Update libnkutils

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
mpd: Use the new actions parsing API

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>