Upper version limit of `packaging`

This upper version limit of packaging:

https://github.com/vyperlang/vvm/blob/d4a8ce746cfc8fffe162a49f496160c2212a9450/setup.py#L20

does not make sense because packaging uses Calendar versioning and therefore the first number indicates the year it is released in rather than a major release with breaking changes.