Support for jQuery 4.0.0
This release finalizes Mockjax support for jQuery 4.0.0. No breaking changes were required (but note that jQuery 4.0.0 DOES have breaking changes from 3.7.1!)
* Updated tests to support for jQuery 4.0.0
* Removed deprecated calls to $.isArray() and $.isFunction()
* Updated cross-origin tests to use a safe domain
This release also cleans up some test infrastructure, but note that there were minimal changes to the library itself!