Googet should interpret the version string "1" as "1.0.0" instead of "0.0.1"

[nguyen-phillip]

ParseVersion and fixVer in goospec.go have the unexpected behavior of taking version strings with less than 3 components and converting them into 3-component versions by prepending leading 0s rather than appending 0s. This means that "1" becomes "0.0.1" and "1.2" becomes "0.1.2" which results in comparisons like

• "1" < "1.0" < "1.0.0"
• "2" < "1.1"
• "3" < "1.0.0"
• "1.5" < "1.2.0"

This is contrary to the behavior of semver.ParseTolerant and common interpretations of version string comparisons.