input: Write a python function to sort a dictionary by its values in ascending order using the `itemgetter` function from the `operator` module.
  assert sort_dict_by_values({"Dave": 20, "John": 40, "Rachel": 55}) == [('Dave', 20), ('John', 40), ('Rachel', 55)]
  assert sort_dict_by_values({"Alice": 50, "Bob": 30, "Eve": 70}) == [('Bob', 30), ('Alice', 50), ('Eve', 70)]
  assert sort_dict_by_values({"Zoe": 10, "Anna": 5, "Mike": 15}) == [('Anna', 5), ('Zoe', 10), ('Mike', 15)]
output: def sort_dict_by_values(d):
      from operator import itemgetter
      return sorted(d.items(), key=itemgetter(1))