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 ] ]