handle new version # format

[fool]

- Do you want to request a feature or report a bug?
well it feels like a bug but I think it is a feature.

- What is the current behavior?
using hugo versions >0.53 if you naively use 0.54 you get a failure to find version from binrc. Hey-o, they changed the version # to 0.54.0 after 0.53: https://github.com/gohugoio/hugo/releases

- If the current behavior is a bug, please provide the steps to reproduce.
entering a version of 0.53 works. Entering a version of 0.54 doesn't, but 0.54.0 does.

- What is the expected behavior?
HUGO_VERSION=0.54 would work

- Please mention your Go version, and operating system version.
n/a