Implement the type version of Lodash.uniq

Unique<T> takes an Array of T, returns the Array of T without repeated values.

// expected to be [1, 2, 3]
type Res1 = Unique<[1, 1, 2, 2, 3, 3]>; 

// expected to be [1, 2, 3, 4, 5]
type Res2 = Unique<[1, 2, 3, 4, 4, 5]>; 

// expected to be [string, number, 1, "a", 2, "b"]
type Res3 = Unique<[string, number, 1, "a", 1, string, 2, "b", 2, number]>;