[BUG] TypeScript: wrong types for `headers`

[jabuj-amalytix]

Environment
JS

Describe the bug
When using the getItemOffersBatch API the headers field is not optional as I assume it should be

requests: [
    {
      marketplaceId: 'A1PA6795UKMFR9',
      method: 'GET',
      uri: '/products/pricing/v0/items/B07QMT57K2/offers',
      itemCondition: 'New',
    },
  ],
// Type "{ marketplaceId: string; method: "GET"; uri: string; itemCondition: "New"; }" is missing the following properties from type "ItemOffersRequest": "headers, customerType".ts(2739)

Even if I specify the headers, they are typed incorrectly as { String: string } instead of { [key: string]: string }

  requests: [
    {
      marketplaceId: 'A1PA6795UKMFR9',
      method: 'GET',
      uri: '/products/pricing/v0/items/B07QMT57K2/offers',
      itemCondition: 'New',
      headers: {}
    },
  ],

// The property `String` is missing from the type `{}`, but required in type `{String: string}`. ts(2741)