including es5-shim instead of standalone bind polyfill

[magalhas]

Phantomjs bind polyfill doesn't work properly in certain cases. Also this is a good way to include scripts at the top whenever needed (such as other polyfills).

[sindresorhus]

Phantomjs bind polyfill doesn't work property in certain cases

What cases? I'd rather see the polyfill fixed than adding another option.

[magalhas]

Using React on Jasmine results on an invalid instanceof usage. Though making the polyfill work is a good approach, I think that being able to include other polyfills or scripts at the top is a nice to have feature.

[jsoverson]

The polyfill was taken from MDN, what's the accepted best polyfill for bind()?

[jsoverson]

actually, scratch that, i'm just going to include es5-shim to catch any other cases that might exist in phantom.

[magalhas]

I think es5-shim solves the issue. Though being able to change which polyfills are being used would be nice. Do you want me to change the PR to include es5-shim?

[magalhas]

Following up what you've said @jsoverson I've included the es5-shim dependency, It solved my particular issue and it'll probably solve many others.