migrate python collection types from typing types to native types (i.e. List[str] -> list[str]) #25
Description
the python typing types were introduced in python 3.5. in python 3.9, the typing types for collections became deprecated in favour of native typing, which was previously unsupported and wouldn't compile.
we use a lot of typing types for collections here in osprey, and we should probably migrate off of it if we want to make sure we are up to snuff for future python releases. it's also a lot cleaner, if nothing else c:
https://typing.python.org/en/latest/spec/historical.html#generics-in-standard-collections
check out this article for a more detailed breakdown