docs: update README with the new onfido version

[pnodet]

Documentation has not been updated since v3. The file upload example needs to be updated.

Also, the types indicates that we can pass a LocationBuilder but doing so results in error: source.on is not a function

await onfidoClient
        .uploadDocument(
          type,
          applicantId,
          new FileTransfer(Buffer.from(document.buffer), document.originalname),
          document.mimetype as UploadDocumentFileTypeEnum,
          side,
          'FRA',
          false,
          { country_of_residence: 'FRA' },
        )

Maybe the file downloads documentation should be updated too.

[dvacca-onfido]

LGTM. Thanks @pnodet for your contribution.

I've made the change permanent as part of PR: onfido/onfido-openapi-spec#113
That PR is also going to include an improved download section.

I'll be back to you regarding the issue you raised regarding the location parameter.

[dvacca-onfido]

@pnodet we've delivered version v3.5.0 which should solve the issue with document upload with location you've raised.

[pnodet]

Thanks a lot, will check!