input: Write a python function to reverse the characters of each string in a provided list of strings.
  assert reverse_strings(['Red', 'Green', 'Blue', 'White', 'Black']) == ['deR', 'neerG', 'eulB', 'etihW', 'kcalB']
  assert reverse_strings(['john','amal','joel','george']) == ['nhoj','lama','leoj','egroeg']
  assert reverse_strings(['jack','john','mary']) == ['kcaj','nhoj','yram']
output: def reverse_strings(lst):
      return [s[::-1] for s in lst]