Update changelog for v0.0.3.

Author: andrewkroh

CHANGELOG.md

@@ -4,6 +4,16 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+### Added
+
+### Changed
+
+### Deprecated
+
+### Removed
+
+## [0.0.3]
+
 ### Added
 - auparse - Convert auid and session values of `4294967295` or `-1` to "unset". #5
 - auparse - Added `MarshallText` method to AuditMessageType to enable the value