Write `findGaps(blocks, min, max)` returning array of missing numbers.
Required in your answer: new Setgaps.push
Runs in a sandboxed worker
function findGaps(blocks, min, max) {
const seen = new Set(blocks);
const gaps = [];
for (let i = min; i <= max; i++) {
if (!seen.has(i)) gaps.push(i);
}
return gaps;
}
