input: Write a function to find the maximum value in a list.
  assert findMax([2, -1, 15, 8, 9, 10]) == 15
  assert findMax([1, 2, 3, 4, 5]) == 5
  assert findMax([-10, -20, -30, -1]) == -1
output: def findMax(lst):
      return max(lst)