previously it would crash with:
SyntaxError: Forward reference must be an expression -- got 'yield'
(reproducible via python3 -c 'from typing import Union; Union[int, "yield"]' )
- restructure query code for cli, some test fixes
- initial query_range implementation
refactored functions in query some more
to allow re-use in range_range, select()
pretty much just calls out to a bunch
of handlers now
