[suggestion] Nicer `caseof` syntax

[DanweDE]

A thought: How about instead of:

caseof(value, [
  [C, C2, (c) => c],
  [D, (d) => null]
])

also (or exclusively) allowing a imho much nicer:

caseof(value,
  C, C2,
  (c) => c,
  D,
  (d) => null
)

[geigerzaehler]

I like the first version. Feel free to open a PR

The second one is probably hard to parse and also (in my subjective oppinion) harder to read. So we will not add it.