Add default values to optional `cost` and `usage` fields in ChatCompletion and ChatCompletionChunk types
0.0.37
Fix error in initialization of ChatCompletion and ChatCompletionChunk when cost is passed from API
0.0.36
- Support earlier python versions: 3.9 and 3.10 - Add `cost` field to ChatCompletion and ChatCompletionChunk types and automatically calculate it based on `model` and `token_usage`.
0.0.35
Fix links in Readme
0.0.34
Update License and Readme. Remove unused `requests` dependency.