Uint64 values out of range

[jonyoder]

I was testing the version parsing against all current PyPI.org versions, and I ran into some out-of-range version components that are allowed by PyPI.org:

error parsing version: strconv.ParseUint: parsing "20210609131134657401": value out of range
error parsing version: strconv.ParseUint: parsing "9786796767868973145897342348293748973489579438579384579384": value out of range
error parsing version: strconv.ParseUint: parsing "14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593": value out of range

I have a working fix that modifies part.Uint64 to use math/big instead of uint64, and it fixes the issue. These changes are on a fork in our codebase.

Would you be interested in these improvements? If so, I can create a pull request here and also in the related aquasecurity/go-version module. Obviously, I would also change the modifications in go-version to add a new part type instead of modifying part.Uint64.