Wrapper around react hooks.

Many functions take a `deps` argument, corresponding to their React
equivalent.  This is an argument which can either be a a vector of
deps or a special keyword:

vector of deps  Use specified deps explicitly.
:always         Re-run hook on every render, equivalent to passing no deps
                vector to the hook.
:once           Equivalent to using [] as the deps.
:auto-deps      Infer the dependencies automatically from the code by finding
                local vars.  Not available for the function form of a hook.