BUG: Silently defaults to latest module version if invalid version is passed

[daniel-butler-irl]

If you pass an invalid module version it appears to silently replace the version with the latest. I think it should throw an error and at the very least give a warning.

apiVersion: cloudnativetoolkit.dev/v1alpha1
kind: BillOfMaterial
metadata:
  name: test
spec:
  modules:
    - name: ibm-resource-group
      version: not_a_valid_version

This BOM successfully builds with not warnings, uses the latest version of ibm-resource-group