unique-subsets Finds all possible unique subsets of a superset. Example: let uniqueSubsets = require('unique-subsets'); uniqueSubsets([1, 2, 3]); // Returns: [ [ 1 ], [ 2 ], [ 3 ], [ 1, 2 ], [ 1, 3 ], [ 2, 3 ], [ 1, 2, 3 ] ]