==== External libraries ====
* Update es5-shim from v4.0.0 to v4.1.5.
* Update json2 from revision 2014-02-04 to 2015-05-03.
-* Update Sinon.JS from 1.10.3 to 1.15.0.
+* Update Sinon.JS from 1.10.3 to 1.15.4.
* Upgrade jQuery Client from v1.0.0 to v2.0.0.
* Added mediawiki/at-ease 1.0.0.
* Update QUnit from v1.17.1 to v1.18.0.