Correctly parse version string if set to "latest"

[Teraskull]

Recently Winget allowed to submit download URLs that don't have a specific version label, and just add latest as a package version in the yaml manifest:

PackageVersion: latest

Winstall parses the latest string as a regular version, and the result looks like this:

As an option, it can be displayed as Latest (without the v).

[ItzLevvie]

Or the much better option would be to remove it entirely (unless you want to deal with registry expressions) because there are applications in the Windows Package Manager that already has v as part of the application version shown in the Control Panel; this means that winstall will show vv20210611 or v.v20210611 rather than v20210611.