set release date for v0.1.0

Author: the-mikedavis

CHANGELOG.md

@@ -6,8 +6,9 @@ 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).
 
-## 0.1.0 - [UNRELEASED]
+## 0.1.0 - 2021-06-30
 
 ### Added
 
 - Initial implementation
+    - includes HTTP/1.1 and HTTP/2 support and extensions