input: Write a python function to convert a list of strings to a list of floats.
  assert string_to_float(["1.1", "2.2", "3.3"]) == [1.1, 2.2, 3.3]
  assert string_to_float(["0.0", "4.5", "6.7"]) == [0.0, 4.5, 6.7]
  assert string_to_float(["7.89", "12.34", "0.56"]) == [7.89, 12.34, 0.56]
output: def string_to_float(lst):
      return [float(i) for i in lst]