handle tsv gzip responses, e.g. salesReports

[dfabulich]

Fixes #4.

@tkafka Do you have an opinion of whether we should return the raw TSV text or whether we should convert the TSV to a JSON object first?

This PR returns a JSON object in a fake {data: []} object, like this:

{ "data": [
      Provider: 'APPLE',
      'Provider Country': 'US',
      SKU: 'MYSKU',
      Developer: 'My Developer Name',
      Title: 'My App Name',
      Version: '1.0.0',
      'Product Type Identifier': '7F',
      Units: '1',
      'Developer Proceeds': '0.00',
      'Begin Date': '06/15/2024',
      'End Date': '06/15/2024',
      'Customer Currency': 'CHF',
      'Country Code': 'CH',
      'Currency of Proceeds': 'CHF',
      'Apple Identifier': '1363309257',
      'Customer Price': '0.00',
      'Promo Code': ' ',
      'Parent Identifier': ' ',
      Subscription: ' ',
      Period: ' ',
      Category: 'Games',
      CMB: '',
      Device: 'iPad',
      'Supported Platforms': 'iOS',
      'Proceeds Reason': ' ',
      'Preserved Pricing': ' ',
      Client: ' ',
      'Order Type': ' '
    }
] }

That way, you can write code like this:

const {data: report} = await read(url);
console.log(report.length);

But maybe I should just return the raw TSV as a giant string. Or at least not make a fake data key, just return the report results inline.

What do you think?