Extend int-pair literal range

[jjallan]

Remove the (unnecessary) restriction to the first 250 bytes of the code-page and up the base used from 250 to 256. New range will be [-32767, -100] and [1001, 33868] (minimal negative at ⁽°d, maximal negative at ⁽””, minimal positive at ⁽¡¡, maximal positive at ⁽°c). Note: not backwardly compatible, but does cover the old range so any existing Jelly code may be ported.

[DennisMitchell]

I don't really want to make backwards-incompatible changes. Maybe there's something else we can do with the remaining 3036 combinations?

[GolfingSuccess]

@DennisMitchell I suggest putting the 3036 extra integers in those.