Make the separator separate from the number

Having the separator as part of the number is annoying when you want to use the number in any bash programming. Currently the way to do this is:

    ghi | grep Sponsorship | awk '{gsub(/:/, "", $1); print $1}'

With this fix it's ```ghi | grep Sponsorship | awk '{print $1}'```

just that little bit friendlier
Remove ':' from number when !STDOUT.tty?

Makes it easier to pipe the output and extract the issue number.

Signed-off-by: Stephen Celis <stephen@stephencelis.com>
Bump version

Signed-off-by: Stephen Celis <stephen@stephencelis.com>