Create a function that takes two parameters (start, stop), and returns the sum of all even numbers in the range.
sum_even_nums_in_range(10, 20) ➞ 90
# 10, 12, 14, 16, 18, 20
sum_even_nums_in_range(51, 150) ➞ 5050
sum_even_nums_in_range(63, 97) ➞ 1360
Remember that the start and stop values are inclusive.