Version 0.4.0

• Function call support for the chat completion with a json output:
  • Function createChatFunCompletion introduced with functions defined by a new data holder FunctionSpec
  • To stay compatible with the standard createChatCompletion function the existing MessageSpec has not been changed
  • Important ⚠️: to harmonize (redundant) response classes, ChatMessage was replaced by the identical MessageSpec class
• New gpt-3.5-turbo and gpt-4 models for the snapshot 0613 added to ModelId. Old models deprecated.
• OpenAIService.close method declared with parentheses (thanks @phelps-sg).
• Scala 2.12 bumped to 2.12.18 and Scala 2.13 to 2.13.11.
• sbt version bumped to 1.9.0 (thanks @phelps-sg)
• Command renamed to EndPoint and Tag renamed to Param.
• OpenAIMultiServiceAdapter - ofRotationType deprecated in favor of a new name ofRoundRobinType
• OpenAIMultiServiceAdapter - ofRandomAccessType deprecated in favor of ofRandomOrderType.