Update pretender.js

[olivierlesnicki]

fix #85

[trek]

Can you check my CI is failing?

[thijsvdanker]

CI was failing because extracting FakeXMLHttpRequest gave an error

bower invalid-meta  fake-xml-http-request is missing "ignore" entry in bower.json

And pretender.js fails when requiring 'fake-xml-http-request'.

I was having issues with callbacks not being called as well, even when using jQuery 2.x.
Using @olivierlesnicki PR fixed the issue for me, but I have too little knowledge of the internals to say if it's good.

[thijsvdanker]

@trek Can you run CI again to see if it was indeed a hickup?

[olivierlesnicki]

@thijsvdanker I've triggered the CI again

[trek]

CI is still failing, sadly.

[thijsvdanker]

This time CI actually fails because of the patch. I can reproduce the failing test with running npm test locally.
Reverting the patch makes the test pass again.

[john-kurkowski]

Should this be closed in favor of #130? That one fixes the same issue, performs refactoring, and tests pass. All it needs is to add jQuery 1.x to the test suite.

[olivierlesnicki]

@john-kurkowski agreed

[trek]

Closing in favor of #130