Add a way to run Yup validation in strict mode

[PatoBeltran]

🚀 Feature request

Currently the code in validateYupSchema only sets the abortEarly and context options. I have a case where I need to mutate my form schema only on cast and not on every validation, so being able to set the strict option to yup validation would be useful.

Could it be possible to expose the validation options so that I can specify the validation needed? This could be as props to the formik component or with whatever method is easier.

Here is the yup docs that explain the validation options: https://github.com/jquense/yup#mixedvalidatevalue-any-options-object-promiseany-validationerror

And this is the code that would need to pass in the exposed options:

/**
 * Validate a yup schema.
 */
export function validateYupSchema<T extends FormikValues>(
  values: T,
  schema: any,
  sync: boolean = false,
  context: any = {}
): Promise<Partial<T>> {
  let validateData: FormikValues = {};
  for (let k in values) {
    if (values.hasOwnProperty(k)) {
      const key = String(k);
      validateData[key] = values[key] !== '' ? values[key] : undefined;
    }
  }
  return schema[sync ? 'validateSync' : 'validate'](validateData, {
    abortEarly: false,
    context: context,
  });
}

[maddhruv]

Not sure if exposing all the yup Options be right here, as more options can make things go complex around the core APIs.

For now, I would recommend you to use custom validation/form validation, more info here - https://formik.org/docs/guides/validation

where you can easily write custom yup validations and also pass the corresponding strict checks