Feature: Default to prerelease if no releases

[pa-0]

Just a thought:

Given the nature of GitHub, some repositories on GitHub (quite a few actually) develop newer applications. As such, it is very common that these repositories label their releases as "prereleases" for months -- sometimes years!

It would be great if ghrel were able to default to downloading the latest prerelease, at least in cases where there are not yet any releases to download rather than returning a 404 Not Found.

Other installer tools like PowerShellGet and winget have a --allow-prerelease flag (I think?). If I could (meaning had the necessary skill), I'd definitely be 'doing' instead of just 'talking' but unfortunately I am still a beginner! 😄

Prerelease-support or not, this is a great tool so definitely not complaining! Thank you for making it available!!