Update CHANGELOG.md

Author: barryvdh

CHANGELOG.md

@@ -5,9 +5,16 @@ 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).
 
-## [Unreleased]
+## 1.0
 
 ### Changed since split from asm89/stack-cors
 
 - Renamed Asm89\Stack namespace to Fruitcake\Cors
-- Removed HttpKernel middleware
+- Removed HttpKernel middleware
+
+### New Features
+- Allow underscore options (both `allowed_origins` and `allowedOrigins` are allowed)
+- Support wildcard patterns on AllowedOrigins (eg `https://*.example.com` will be converted to an allowedOriginPattern)
+- Validate input (so invalid options are caught immediately)
+- Bump PHPStan to Level 9
+- Ensure 100% Code Coverage