input: Write a python function to convert a list of strings to a list of floats.
  assert convertStringToFloat(['45', '87.5', '90.9', '24']) == [45.0, 87.5, 90.9, 24.0]
  assert convertStringToFloat(['0', '1.1', '2.2', '3.3']) == [0.0, 1.1, 2.2, 3.3]
  assert convertStringToFloat(['-1', '-2.5', '0.0', '100']) == [-1.0, -2.5, 0.0, 100.0]
output: def convertStringToFloat(lst):
      return [float(x) for x in lst]