Solve nested schema references instead of duplicating json schemas

[visch]

https://github.com/AutoIDM/tap-clickup/pull/105/files I pointed to a few duplicated code references. I put a request into the pipelinewise-singer-python folks here transferwise/pipelinewise-singer-python#55 .

We could probably run the resolver twice and get to where we want instead of waiting? I'm not certain