update changelog

Author: thambley

CHANGELOG.md

@@ -1,33 +1,50 @@
 # Changelog
 
+## [Unreleased]
+
+### Added
+
+* Add only_columns [#7][]
+
+### Fixed
+
+* Fix typo in README.md cpunion [#11][] by [@cpunion][]
+
+### Changed
+
+* Update tests for ActiveAdmin 1.2
+
 ## 1.0.5
 
-### Updates
+### Fixed
 
 * Fix #1 - Unnecessary database access
 * Fix broken tests
 
 ## 1.0.4
 
-### Updates
+### Fixed
 
 * Minor bug fixes / typo corrections
 
 ## 1.0.3
 
-### Updates
+### Fixed
 
 * Move require rake from gemspec to lib/activeadmin-xls.rb [#4][] by [@ejaypcanaria][]
 
 ## 1.0.2
 
-### Bug Fixes
+### Fixed
 
 * Fixes undefined local variable or `method max_per_page` [#3][] by [@rewritten][]
 
 <!--- Link List --->
 [#3]: https://github.com/thambley/activeadmin-xls/issues/3
 [#4]: https://github.com/thambley/activeadmin-xls/pull/4
+[#7]: https://github.com/thambley/activeadmin-xls/issues/7
+[#11]: https://github.com/thambley/activeadmin-xls/pull/11
 
 [@rewritten]: https://github.com/rewritten
 [@ejaypcanaria]: https://github.com/ejaypcanaria
+[@cpunion]: https://github.com/cpunion