Does not recognize Russia

[gajus]

getAlpha2Code('Russia', 'en');
// => null

I presume this is because it is trying to match "Russian Federation". However, it would be nice if this library took into consideration the alternative names too.

[gajus]

I have written a simple local abstraction, it would be nice to have a version of this supported by this library:

// @flow

import {
  // eslint-disable-next-line id-match
  getAlpha2Code as getCountryAlpha2Code,
} from 'i18n-iso-countries';

/**
 * Country name map based on IMDb, e.g.
 * https://www.imdb.com/title/tt6303866/releaseinfo
 */
const countryNameMap = {
  RUSSIA: 'RU',
  UK: 'GB',
  USA: 'US',
};

export default (subject: string): string | null => {
  const countryCode = getCountryAlpha2Code(subject, 'en');

  if (countryCode) {
    return countryCode.toUpperCase();
  }

  return countryNameMap[subject.toUpperCase()] || null;
};

[danilofuchs]

#175 allows us to use an array of alternative names