v0.0.7

• Add the cache_control field to various API objects.
• MessagesResponse.system is now a vec of Content objects.
• Add cache_creation_input_tokens and cache_read_input_tokens to Usage
• MessagesResponse.usage is now cumulative for streamed responses
• Fix ToolChoice::SpecifiedTool structure (@philpax)
• Add support for error events in streaming responses

v0.0.6

• Support beta header to enable extended token output. See:
  https://docs.anthropic.com/en/release-notes/api#july-15th-2024
• misan chat: Interactive chat command
• misan: --json flag to output responses as JSON
• @philpax: Improved error responses
• MessagesRequest.merge_response and merge_streamed_response to merge responses
  into requests
• Add support for specifying stop tokens

v0.0.4

Documentation updates