Shiv for "sortedIndex"

[aikoven]

Shiv for "min" and "max" breaks "sortedIndex" on arrays of strings:

_.sortedIndex(['a', 'd', 'f'], 'c')

Second argument is transformed to propGetterFactory:

args[1] = propGetterFactory(args[1]);

https://github.com/floydsoft/angular-underscore/blob/master/angular-underscore.js#L28