input: Write a python function to find the missing numbers in a given list.
  assert missingNumbers([2, 3, 5, 6, 7, 8, 10]) == [4, 9]
  assert missingNumbers([1, 2, 4, 6, 8, 9]) == [3, 5, 7]
  assert missingNumbers([10, 12, 13, 15, 18]) == [11, 14, 16, 17]
output: def missingNumbers(lst):
      if not lst:
          return []
      return [num for num in range(min(lst), max(lst) + 1) if num not in lst]