Fix types for Case_Folding and Special_Casing mappings

[auvred]

Special_Casing uses Map<number, number[]>

node-unicode-data/scripts/parse-special-casing.js

Lines 39 to 40 in d03bce2

	specialCasingMap["Uppercase" + storageKeyPostfix] ??= new Map();
	specialCasingMap["Uppercase" + storageKeyPostfix].set(from, uppercase);

node-unicode-data/scripts/parse-special-casing.js

Line 24 in d03bce2

const uppercase = data[3] === "" ? [] : data[3].split(' ').map(function(codePoint) {

Case_Folding uses Map<number, number[]> for full case folding (it's always one-to-many mapping). Map<number, number> for common, simple and special case foldings foldings (which are guaranteed to be one-to-one mappings).

node-unicode-data/scripts/parse-case-folding.js

Lines 25 to 28 in d03bce2

	caseFoldingMap[status].set(
	codePoint,
	mappings.length == 1 ? mappings[0] : mappings
	);

[JLHwung]

Thank you.

[mathiasbynens]

Cheers!

[mathiasbynens]

…and this is now released. Thanks again!