Taiwan's locality_name_type

Taiwan does not currently provide a `locality_name_type`, so it defaults to `city` per `ZZ`.

However, the administrative division and consequently the address format for Taiwan is as follows:

`state_name_type`: municipality or county (I think `county` is fine)
`locality_name_type`: city district or township (this is not `city`, large cities are counties, small ones are parts of larger townships)

It seems like the correct `locality_name_type` would be `district`.