Log Message:
Updated from version 1.22nb1 to 1.23.

Upstream changes:

2009-01-16  Jarkko Hietaniemi  <jhi@iki.fi>
	* Add overload for '@{}' as suggested by John Loverso,
	  meaning that you can now do @$set and get the members
	  of the set (unordered, mind) [rt.cpan.org #42452]
	* Add overload for '=' (how did we manage so long without?)
	  [rt.cpan.org #42449]
	* Remove explicit import of UNIVERSAL::isa()
	  [rt.cpan.org #42451]
	* Modernize META.yml.
	* Released as 1.23.