Updated CHANGELOG for 1.2.0 release

Author: dragonmantank

CHANGELOG.md

@@ -1,17 +1,26 @@
 # Change Log
 
-## [Unreleased]
+## [1.2.0] - 2017-01-22
 ### Added
+- Added IDE, CodeSniffer, and StyleCI.IO support
+
 ### Changed
+- Switched to PSR-4 Autoloading
+
 ### Fixed
+- 0 step expressions are handled better
+- Fixed `DayOfMonth` validation to be more strict
+- Typos
 
-## [1.1.0] - 2015-01-26
+## [1.1.0] - 2016-01-26
 ### Added
 - Support for non-hourly offset timezones 
 - Checks for valid expressions
+
 ### Changed
 - Max Iterations no longer hardcoded for `getRunDate()`
 - Supports DateTimeImmutable for newer PHP verions
+
 ### Fixed
 - Fixed looping bug for PHP 7 when determining the last specified weekday of a month
 
@@ -24,4 +33,4 @@
 
 ### Fixed
 - Fixes issue [#28](https://github.com/mtdowling/cron-expression/issues/28) where PHP increments of ranges were failing due to PHP casting hyphens to 0
-- Only set default timezone if the given $currentTime is not a DateTime instance ([#34](https://github.com/mtdowling/cron-expression/issues/34))
+- Only set default timezone if the given $currentTime is not a DateTime instance ([#34](https://github.com/mtdowling/cron-expression/issues/34))