json: less willing to upcast large integers into floats.
json: less willing to upcast large integers into floats.

This really does not jive well with our mental model of tokens which
are agnostic to particular serial format.  And the idea of potentially
*silently* losing precision of a number when processed in this way
seems rather alarming to me, even if it is considered (to some extent?)
"normal" for json to do so.

polydawn/refmt,polydawn/go-xlate,polydawn/go-xlate,polydawn/refmt