Can you add gender option?

[nodkrot]

Speech.speak({
  text: 'React Native Speech is awesome!  I\'m going to use it in my next project.',
  voice: 'en-US',
  gender: 'female'
});

[christinac]

Just realized that different countries are gendered differently (e.g. en-GB is a male voice) so while gender isn't an explicit option, it is available.