Write a function that sorts the positive numbers in ascending order, and keeps the negative numbers untouched.
posNegSort([6, 3, -2, 5, -8, 2, -2]) ➞ [2, 3, -2, 5, -8, 6, -2]
posNegSort([6, 5, 4, -1, 3, 2, -1, 1]) ➞ [1, 2, 3, -1, 4, 5, -1, 6]
posNegSort([-5, -5, -5, -5, 7, -5]) ➞ [-5, -5, -5, -5, 7, -5]
posNegSort([]) ➞ []