Add bash completion for `pull --parallel`
Add bash completion for `pull --parallel`

Signed-off-by: Harald Albers <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@albersweb.de>

hoogenm/compose,vdemeester/compose,dnephin/compose,swoopla/compose,schmunk42/compose,shin-/compose,vdemeester/compose,thaJeztah/compose,funkyfuture/docker-compose,swoopla/compose,shin-/compose,hoogenm/compose,jrabbit/compose,dnephin/compose,funkyfuture/docker-compose,jrabbit/compose,sdurrheimer/compose,thaJeztah/compose,sdurrheimer/compose,schmunk42/compose