input: Develop a function to retrieve the smallest integers from a specified list using the heapq module.
  assert smallest_integers_heapq([25, 35, 22, 85, 14, 65, 75, 25, 58], 3) == [14, 22, 25]
  assert smallest_integers_heapq([25, 35, 22, 85, 14, 65, 75, 25, 58], 2) == [14, 22]
  assert smallest_integers_heapq([25, 35, 22, 85, 14, 65, 75, 22, 58], 5) == [14, 22, 22, 25, 35]
output:     import heapq
  
  def smallest_integers_heapq(numbers, n):
      return heapq.nsmallest(n, numbers)