yup.string().required() results in string | undefined

Describe the bug When marking a string (or any other type) as .required(), the result of a cast, according to TypeScript, is string | undefined instead of the exepcted string (as it was previously the case with definitely typed typings). Current workaround I use is to define an empty default.

To Reproduce

const schema = yup.object({
    test: yup.string().required(),
}).required();

const data = schema.cast({test: 'foo'});

// This will throw an error that `string | undefined` is not assignable to `string`.
const test : string = data.test;

Expected behavior required() and defined() should both exclude the undefined type.

[neongreen]

I think this is fixed in 1.0.0-beta.

[DASPRiD]

I ended up just switching to zod, it is definitely geared more towards TypeScript 😃