* add swift5 option for generating frozen enums
* use case unknownDefault to avoid conflicts
* update comments to reflect unknownDefault case
* set default values for unknown case to avoid conflict
* dont need vendor extensions to detect enum raw data type
* move CaseIterableDefaultsLast into models mustache template
* comment catch all case and add support for other types
* add frozen enums to ci pipeline
* remove extraneous edit to extensions template
* remove left over protocols files
* small comment and case adjustments
