With this patch, completion is provided for images already present
in the local image cache to help pulling the latest version of the
same tag;
docker pull go<tab>
golang:1.12 golang:1.18.0 golang:1.21 golang:1.24 gopher:latest
golang:1.13 golang:1.20 golang:1.23 golang:latest
docker pull golang:<tab>
1.12 1.13 1.18.0 1.20 1.21 1.23 1.24 latest
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>