chore: Update Changelog

Author: Constantinos Symeonides

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.8.1 - Unreleased
+
+### Additions
+
+- Multipart requests now support non-file fields
+
 ## 0.8.0 - 2021-02-19
 
 ### Breaking Changes