Underscore collections functions should take objects

[elldritch]

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  • Authors: @borisyankov @jbaldwin @ccurrens

All functions under Underscore's "Collection Functions" category should take both arrays and objects (i.e. both _.List<T>s and _.Dictionary<T>s). However, the types for these functions only allow _.List<T> (for example, _.sortBy and _.groupBy).