Update changelog

Author: paulhammond

CHANGELOG.md

@@ -1,4 +1,13 @@
-### v3.2.1 (2015-02-03):
+### v1.4.0 (2015-02-25):
+
+  * Added callbacks to all API calls ([#20](https://github.com/slackhq/node-slack-client/pull/20))
+  * Added support for star added/delete events ([#27](https://github.com/slackhq/node-slack-client/pull/27)
+  * Fixed sample code ([#18](https://github.com/slackhq/node-slack-client/issues/18))
+  * `getChannelByName` now strips leading hash marks ([#9](https://github.com/slackhq/node-slack-client/pull/9))
+  * Dropped support for Node 0.8 ([#25](https://github.com/slackhq/node-slack-client/pull/25))
+  * Fix duplicate scripts entries in package.json ([230c7f74](https://github.com/slackhq/node-slack-client/commit/230c7f743a48f600aff5660367cf1e6816cc67e2))
+
+### v1.3.1 (2015-02-03):
 
   * Added ability to call chat.postMessage web API method ([#15](https://github.com/slackhq/node-slack-client/pull/15))
   * Added ability to update and delete messages ([#14](https://github.com/slackhq/node-slack-client/pull/14) and [#17](https://github.com/slackhq/node-slack-client/pull/17))