Update to latest model 3.5

[nathjyo]

Its not really an issue,

I should of done a pull request but figured it would get seen faster here,

was wandering about an update to support GPT 3.5 specifically gpt-3.5-turbo

its much quicker and cheaper and has training data up to sep 2021

I was going to update my own packages but would lose it when I update next

cheers

[underthestars-zhy]

Yes, we should upload this package to the latest api

[adamrushy]

PR is open and will merge today! Thank you for reporting 👍🏼