input: Write a function to generate the squared values of a given list using list comprehension. The function should take a list of integers as input and return a list of their squared values.
  assert get_squared_values([1, 2, 3, 5, 8, 13])==[1, 4, 9, 25, 64, 169]
  assert get_squared_values([0, -1, -2, 3, 4])==[0, 1, 4, 9, 16]
  assert get_squared_values([])==[]
output: def get_squared_values(lst):
      return [x**2 for x in lst]