useTableState was an early and hasty abstraction that hasn't proved useful in many ways. Anything
you could do with useTableState, you could easily do using the same options (assuming they exist) in
the useTable hook. For this reason, state is now a first class citizen of the useTable hook, along
with more sane properties and option locations for anything pertaining to state.
useExpanded now uses a flat array of row path keys for tracking expanded state instead of nested
objects. This is both easier to use as a developer, but also enables expanding all rows or even
leaving nested rows in an expanded state, despite their parent rows' expanded state.
BREAKING CHANGE: See description
tannerlinsley