Write changelog

Author: sue445

CHANGELOG.md

@@ -2,6 +2,12 @@
 ## Unreleased
 [Full Changelog](https://github.com/asonas/chatwork-ruby/compare/v1.0.0...master)
 
+## v1.0.1
+[Full Changelog](https://github.com/asonas/chatwork-ruby/compare/v1.0.1...v1.0.0)
+
+* Fix NoMethodError: undefined method `mime_type=' for ChatWork::Multipart:Class with faraday-multipart v1.1.0+
+  * https://github.com/asonas/chatwork-ruby/pull/90
+
 ## v1.0.0
 [Full Changelog](https://github.com/asonas/chatwork-ruby/compare/v0.12.3...v1.0.0)