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## 1.15.1

**`(fix):`** 如果 Content-Type 头不包含 charset，确保 HTTP 请求中也不包含 charset。

## 1.15.0

**`(feat):`** 为客户端和请求选项添加 `AdditionalHeaders`。这让用户可以为每个请求添加和覆盖头部。