* CMake: Fix target options
* update CMake package version after protocol sync
* Update protocol to 1.59.0
* protocol_gen: change OneOf to `object` type
The DAP spec introduces ambiguities with its particular uses of OneOf,
which means that we can't deserialize the variants generated from it.
Just set OneOf to an `object` type, like godap does.
Schema top-level definitions, such as `InvalidatedAreas` and `SteppingGranularity` were being emitted as empty structures, when they were actually enumerators.
Re-work protocol_gen.go to emit these correctly.
Also bumps the protocol to DAP version 1.46.0
