Requirements.txt should be updated to the latest openai package

[mcasalaina]

The old 1.16 package in there does not work anymore, at least not with any newer model. I found that upgrading it to the latest, 1.59.7, fixed that issue and it was able to call my model (in this case GPT-4o mini 07-18).

[vyokky]

Thanks @mcasalaina , this is fixed in the neweat release.