Format schema with list of objects doesn't work

[avkos]

Expected behavior

Should return formatted data:

// [{ a:1n }, { a:2n }, { a:3n }]

Actual behavior

// [undefined, undefined, undefined]

Steps to reproduce the behavior

import { format } from 'web3-utils';

const schema={
  type: 'array',
  items: {
    type: 'object',
    properties: {
      a: { format: 'uint' },
    },
  },
}
const data = [{ a: 1 }, { a: 2 }, { a: 3 }]

format(schema,data) // [undefined, undefined, undefined]

Logs

Environment