how to pass enums in params?
Right now I am working on a spec where there are two data structures that are identical. The only difference is that they both use a different enum (with overlapping values, so I cannot merge them). I want to use params for this, so something like:

```ksy
type_a:
  params:
    - id: tag_enums
  seq:
    - id: tag
      enum: tag_enums
```

but this doesn't seem to work. What am I doing wrong?