input: Write a python function to sort a list of numbers in ascending order.
  assert SortList([3, 1, 4, 1, 5, 9]).sort_list() == [1, 1, 3, 4, 5, 9]
  assert SortList([10, 9, 8, 7, 6, 5, 4, 3, 2, 1]).sort_list() == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
  assert SortList([5, 3, 8, 6, 2, 7, 4, 1]).sort_list() == [1, 2, 3, 4, 5, 6, 7, 8]
output: class SortList:
      def __init__(self, lst):
          self.lst = lst
  
      def sort_list(self):
          return sorted(self.lst)