Install latest patch version if major.minor semantic version provided; Add latest command to install

[ChronosMasterOfAllTime]

Should resolve the ask in #121.

Adds:

goenv install latest
goenv install unstable

if the semantic version is only supplied with major/minor, find the latest patch version and use that for install.

e.g. if 1.19 is supplied and the following versions are available:

1.19.0
1.19.1
1.19.2

1.19.2 will be installed

Added unit tests to validate functionality

[detro]

This is looking already pretty good: I just left a feed comments that have more to do with long-term maintenance than anything else.

Plus, if I got the regexp right, I think you are intending to match "latest" version to also "beta" and "rc" releases, and I don't think it's a great idea. But I'm not the owner of the repo, so I'd leave it to @syndbg and other maintainers to make the call.

Personally, I think the vast majority of users want a tool that lets them easily switch version of go, while they move across their repositories/projects. Those people are rarely interested in non-stable versions of Go.

[ChronosMasterOfAllTime]

This is looking already pretty good: I just left a feed comments that have more to do with long-term maintenance than anything else.

Plus, if I got the regexp right, I think you are intending to match "latest" version to also "beta" and "rc" releases, and I don't think it's a great idea. But I'm not the owner of the repo, so I'd leave it to @syndbg and other maintainers to make the call.

Personally, I think the vast majority of users want a tool that lets them easily switch version of go, while they move across their repositories/projects. Those people are rarely interested in non-stable versions of Go.

Addressed all comments @detro

[ghost]

Awesome!

[detro]

This looks really good.

[ghost]

@syndbg This looks ready to merge; tests all passed