build: release v1.8.0.

Author: outofcoffee

CHANGELOG.md

@@ -5,6 +5,10 @@ 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).
 
+## [1.8.0] - 2025-10-12
+### Added
+- feat(openapi): allow external $refs (#26)
+
 ## [1.7.0] - 2025-10-09
 ### Added
 - feat: support OpenAPI 3.1 specs in Swagger UI.