Vault Coder v1.12.1 - Bugfixes & better scaladoc

A small update fixing some bugs

Bugfixes

• Previous model validation was not correct in cases where enumeration value parsing was used
  • The current implementation isn't correct, either, but it's easier to fix manually
• Fixed a bug that caused certain inheritance-based combo classes to not get generated / connected correctly

Other changes

• Some of the generated properties are now labeled as val or lazy val instead of def