Upgrading jquery-migrate to 1.2.1

From the release notes of 1.2.0:
*This minor update addresses regressions created by the security fix in the 1.2.0 release that rejected some valid HTML strings. Many thanks to GitHub users gerrod, basc, Leonya, krzyko, and lorddefinitia for reporting these issues.*


http://blog.jquery.com/2013/05/08/jquery-migrate-1-2-1-released/