Add support for the 5 new voices released yesterday

[zaurbek-stark]

Hi!

5 new voices were released yesteday. Could you add them to the package?

We can't use them yet.

Thank you!

[steve-obrien]

These new voices work if you update the session using their string name

ai.updateSession({
    instructions: instructions,
    voice: 'ballad',
})

[hamzasaleem2]

doesn't have all the voices.

[htsuruo]

Hi guys,

I have submitted a PR to support five new voices:
#63

Until the PR is merged, you can replace @openai/realtime-api-beta in your package.json file and then run npm install.

"@openai/realtime-api-beta": "github:htsuruo/openai-realtime-api-beta#feature/htsuruo/support-new-voices",

After this, you will be able to select the new voices with type safety.