Introspection option should be 'introspection'
As per https://wiki.gnome.org/Initiatives/GnomeGoals/MesonPorting the recommended Meson option to enable/disable gobject-introspection is 'introspection' not 'gir'.
As per https://wiki.gnome.org/Initiatives/GnomeGoals/MesonPorting the recommended Meson option to enable/disable gobject-introspection is 'introspection' not 'gir'.