Feature Request: Report validator-wrapper version programmatically

[dehall]

The wrapper has an endpoint /validator/version that currently reports the version of the underlying core validator. https://validator.fhir.org/validator/version currently shows "6.3.3". Since version numbers between the validator and wrapper do not line up 1:1, it would be nice to see at a glance which version of the wrapper is currently running as well.
Two potential ways to approach this might be to either make the current /validator/version return a JSON object with 2 keys, or to create an additional endpoint. If either of these sounds better let me know, I can submit a PR. Or please let us know if this is something you really don't want. Thanks!