v5

[sindresorhus]

• Move to ESM
• Target Node.js 20
• Target TypeScript 5.9
• Make the preserveConsecutiveUppercase option in CamelCase false by default
• Remove this: 32d94dd#diff-9589c7ca28e78a91ac6a3982dce6a6be80734e70af0bcea4092ecaebc04190ffR1-R3
• Make PartialDeep allowUndefinedInNonTupleArrays option false by default.
• Make Split strictLiteralChecks option true by default.
• Change Paths option maxRecursionDepth default value #1029
• Don't make Tagged type compatibility dependent on type fest version #875
• Align behavior with Lodash: KebabCasedProperties transforming : to -: #1074 (comment)
• Schema: Remove undefined from recurseIntoArrays option.
• Add a constraint of object to T for WritableKeysOf and ReadonlyKeysOf
• ArrayTail: Make preserveReadonly option true by default.
• Remove strict: false workaround: ApplyDefaultOptions: Improve behaviour when strictNullChecks is disabled #1096

[voxpelli]

Possibly: #863

[sindresorhus]

@som-sm @Emiyaaaaa I'm planning v5 for right after TypeScript 5.9 is out. Probably 2-3 months out.

Please discuss here if there are any other breaking changes we should do that are not mentioned in the issue body.

[som-sm]

@sindresorhus Do we want to update anything with the If* types, as suggested in #788 (comment)?

I would deprecate the Is* and refer people to the If* (#788 (comment))

I feel more inclined towards this, but Is* variants are likely much more common in codebases, so deprecating them could be annoying.

[ethanresnick]

Very excited for v5 / #875 to land. It just bit me hard today

[filipw01]

Linking it to update behavior of kebabCase #1074 (comment)