Bump version, add a changelog

Author: ylansegal

CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+## [1.2.0]
+### Added
+- Support for using with the [strong_migrations](https://github.com/ankane/strong_migrations) gem

lib/migration_lock_timeout/version.rb

@@ -1,3 +1,3 @@
 module MigrationLockTimeout
-  VERSION = "1.1.0"
+  VERSION = "1.2.0".freeze
 end