How to check which version is installed?

[HenrikBengtsson]

Is there a way to check which version is installed? The help output does not reveal it, e.g.

$ imgcat --help
usage: imgcat [flags] filename
  -height string
        height (e.g. 100px, 10%, or auto)
  -p    preserve aspect ratio
  -size string
        width,height in pixels (e.g. 1024px,768px or 3,3)
  -width string
        width (e.g. 100px, 10%, or auto)

$ imgls --help
usage: imgls [flags] filename
  -height string
        height (e.g. 100px, 10%, or auto)
  -size string
        width,height in pixels (e.g. 1024px,768px or 3,3)
  -width string
        width (e.g. 100px, 10%, or auto)