Removal of Elements leaving duplicate elements

[nfrankeln]

The current removal method doesn't properly remove an element from the storage array.
Example if the heap is [ 0, 1, 5, 15, 45, 14, 10, 34 ]
calling removeMin results in [1, 15, 5, 34, 45, 14, 10, 34]
I fixed this by adding this.storage.pop() to the remove min method so that it correctly returns [1, 15, 5, 34, 45, 14, 10]

new removeMin code

removeMin(){
       if(this.size === 0){
           throw new Error("Empty Heap")
       }
       let data = this.storage[0]
       this.storage[0] = this.storage[this.size -1]
       this.storage.pop()
       this.size -= 1
       this.heapifyDown(0)
       return data
   }

Can I make a pull request with these changes?