Update changelog for 18.1.0

Author: jamescdavis

CHANGELOG.md

@@ -4,7 +4,7 @@ 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).
 
-## [Unreleased]
+## [18.1.0] - 2018-10-30
 ### Added
 - Components:
     - `panel` - a general-use abstraction of bootstrap panels
@@ -15,6 +15,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Changed
 - Components:
     - `loading-indicator` - added inline option
+- Utilities:
+    - `fix-special-chars` - made case-insensitive
 - Tests:
     - `loading-indicator` - added tests for inline
 - Handbook: