Create a function that returns true if there's at least one prime number in the given range (n1 to n2 (inclusive)), false otherwise.
primeInRange(10, 15) ➞ true
// Prime numbers in range: 11, 13
primeInRange(62, 66) ➞ false
// No prime numbers in range.
primeInRange(3, 5) ➞ true
// Prime numbers in range: 3, 5
n2 is always greater than n1.n1 and n2 are always positive.