Merge pull request #189 from jamesrochabrun/fix/issue-188-streaming-function-call-name

Fix streaming function call decoding error when 'name' field is missing

Author: jamesrochabrun

Sources/OpenAI/Public/ResponseModels/Response/ResponseStreamEvent.swift

@@ -607,7 +607,7 @@ public struct FunctionCallArgumentsDoneEvent: Decodable {
   public let type: String
   public let itemId: String
   public let outputIndex: Int
-  public let name: String
+  public let name: String?
   public let arguments: String
   public let sequenceNumber: Int?