updated to reflect v2.3.4 of the library

README

@@ -1,7 +1,7 @@
 === TGM Plugin Activation ===
 Contributors:      Thomas Griffin (@jthomasgriffin / thomasgriffinmedia.com)
                    Gary Jones (Github: @GaryJones / Twitter: GaryJ)
-Version:           2.3.3
+Version:           2.3.4
 Requires at least: 3.0.0
 Tested up to:      3.3.1
 
@@ -35,6 +35,12 @@ You can also follow project progress and updates on Twitter. Follow us here at h
 
 == Changelog ==
 
+= 2.3.4 =
+
+* Fixed undefined index notice when checking for required plugins (props @jeffsebring)
+* Fixed bug where, during a bulk install, if the plugin was defined in the source as pre-packaged but also existed in the repo, it would erroneously pull the plugin from the repo instead (props @wpsmith)
+* Added ability to set nag type for the admin notice via 'nag_type' string (props @wpsmith)
+
 = 2.3.3 =
 
 * Changed license to reflect GPL v2 or later (to be compatible with the WordPress repo)