Issue #648: Rev commons-validator version

[chriswininger]

This addresses a potential security concern as the previous version of commons-validator included a vulnerable version of commons-beanutils

https://ossindex.sonatype.org/component/pkg:maven/commons-beanutils/[email protected]?utm_source=ossindex-client&utm_

Given that most folks use this library for testing it's probably not hugely concerning but seems worth a minor version bump :-)

I created an issue to go with this

[chriswininger]

crickets :crying_cat_face: