input: Write a python function to find the smallest integer in a list.
  assert find_smallest_int([20, 8, 7, 22, 32]) == 7
  assert find_smallest_int([5, 3, 9, 1, 6]) == 1
  assert find_smallest_int([-2, -5, -1, -10, 0]) == -10
output: def find_smallest_int(lst):
      return min(lst)