This is a new API that makes it possible to do more interesting things
with composition. It's currently write-only; doing composition on reads
is much more difficult.
This is a bit awkward because JsonReader.Options doesn't tell you
what its values are.
Also awkward because we don't yet have an equivalent to stream
the encode of the value.
This sets the Automatic-Module-Name for moshi, moshi-adapters, and moshi-kotlin.
It moves moshi-adapters into its own .adapters package and forwards the existing
adapter. It moves the moshi-kotlin into its own .kotlin package and forwards the
existing adapter.
I'm not certain this is necessary or sufficient, but I think it's the right idea
for JPMS compatibility.
