timezone validation and lookup fixes
Fixes ref_timezone_convert, ref_element_lookup, and ref_constant_lookup correctness gaps, plus two doc corrections.
Changed:
ref_element_lookupresolves international/IUPAC spellings (Aluminium, Caesium, Sulphur) via a new name-alias map (#34)ref_unit_convertdescription disambiguatesmt(metric tonne, 1000 kg) vst(US short ton, 907.18 kg) (#35)
Fixed:
ref_timezone_convertrejects out-of-range calendar components instead of silently rolling over viaDate.UTC()(#32)ref_timezone_convertrejects DST spring-forward-gap datetimes instead of returning a non-invertible UTC equivalent (#37)ref_constant_lookupreportsmatch_strategy: "exact_name"for name queries, not"exact_symbol"(#38)- README
ref_constant_lookupentry count corrected from ~360 to 32 (#39)
236 tests pass; bun run devcheck clean.