mode is returning an Array instead of Set if count of modes is same as count of numbers in the parameter passed to mode.

[yrambler2001]

https://codesandbox.io/p/sandbox/jr25j2?file=%2Fsrc%2FApp.tsx%3A10%2C82

Sample cases when the expected result is Set, but the function returns Array.

mode([1, 2])
mode([1, 2, 3, 4])

there on line 88, a Set should be returned