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