Ignore unknown property

Author: kezhenxu94

chatgpt-java-sdk/src/main/java/io/github/kezhenxu94/chatgpt/internal/ChatGPTHttpResponse.java

@@ -56,6 +56,7 @@ public List<Choice> choices() {
     return choices;
   }
 
+  @JsonIgnoreProperties(ignoreUnknown = true)
   public static class Usage {
     private final int promptTokens;
     private final int completionTokens;
@@ -84,6 +85,7 @@ public int totalTokens() {
     }
   }
 
+  @JsonIgnoreProperties(ignoreUnknown = true)
   public static class Choice {
     private final Message message;
     private final String finishReason;

chatgpt-java-sdk/src/main/java/io/github/kezhenxu94/chatgpt/message/Message.java

@@ -1,9 +1,11 @@
 package io.github.kezhenxu94.chatgpt.message;
 
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSubTypes;
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
 
+@JsonIgnoreProperties(ignoreUnknown = true)
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "role")
 @JsonSubTypes({
   @JsonSubTypes.Type(value = UserMessage.class, name = "user"),