* Generics migration
This attempts to migrate this library in the least invasive way by preserving as
much of the original API as possible. It does not change the tests in a
meaningful way nor does it attempt to upgrade any logic that can be simplified
or improved with generics. This is purely an API migration, and still requires a
lot of additional work to be fully ready.
* Fix a few broken tests around serialization
* Add v2 suffix
* Temporarily change mod name for testing
* Rename module to /v2
