Given an array of integers, create a 2-dimensional array
where the first element is a distinct value from the array and
the second element is that value's frequency within the array.
Sort the resulting array descending by frequency.
If multiple values have the same frequency, they should be sorted ascending.
Example
arr = [3, 3, 1, 2, 1]
There are two values, 3 and 1, each with a frequency of 2, and one value 2 with a frequency of 1: [[3, 2], [1, 2], [2, 1]]
Sort the 2-dimensional array descending by frequency: [[3,2], [1, 2], [2, 1]]
Sort the 2-dimensional array ascending by value for values with matching frequencies: [[1,2], [3, 2], [2, 1]]