NPE in `Version.equals()` if snapshot-info `null`

[TimSchweers]

Hi!

The Version.equals implementation updated with 2.16.0 for comparing snapshots raises an NPE if snapshotInfo is null.
I recommend to sanitize the snapshoptInfo within constructor as done for groupId and artifactId.

[cowtowncoder]

Thank you for reporting this @TimSchweers . Yes, that sounds like a good idea to handle (regardless of whether to sanitize or null-check in equals()), avoid NPE.