Catch unexpected values in array

[lesliedoherty]

As a result of a brief linkedin bug where the array prototype was modified, this simple solutions offers better defensive detection of values passed in the config by checking that the value has its own property associated with it.

[lesliedoherty]

Note regarding failing tests. I've opened an issue: #64

[iamEAP]

Thanks for the issue on the test fails @lesliedoherty. I can repro them locally too, but they only occur on the git1 and git2 versions of jQuery.

Maybe we stop testing against "dev" branches for jQuery, but at least update the versions we test against? e.g.

Go from

['1.3.2', '1.4.4', '1.5.2', '1.6.4', '1.7.2', '1.8.3', '1.9.1', '1.10.2', '1.11.3', '1.12.0', 'git1', '2.0.3', '2.1.4', '2.2.0', 'git2']

...to...

['1.3.2', '1.4.4', '1.5.2', '1.6.4', '1.7.2', '1.8.3', '1.9.1', '1.10.2', '1.11.3', '1.12.4', '2.0.3', '2.1.4', '2.2.4', '3.0.0', '3.1.1', '3.2.1']

In Gruntfile.js?

[angrytoast]

The changeset looks good. Would recommend going with @iamEAP's comment in #63 (comment)

[iamEAP]

Thanks all. I updated the jQuery test targets. Merging to master, then picking the change into branches where it applies and releasing updates.