`Heap#change_key` doesn't work properly with `delete = true`

[uvlad7]

test

    it 'changes certain keys' do
      numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 100, 101]

      heap = PfCustomCrawlerNeo::Containers::MinHeap.new(numbers)
      heap.change_key(2, 102, true)
      heap.pop
      heap.pop
      heap.change_key(8, 50, true)
      ordered = []
      ordered << heap.min! until heap.empty?
      expect(ordered).to eql([4, 5, 6, 7, 9, 10, 8, 100, 101, 2])
    end

fails

     Failure/Error: expect(ordered).to eql([4, 5, 6, 7, 9, 10, 8, 100, 101, 2])
     
       expected: [4, 5, 6, 7, 9, 10, 8, 100, 101, 2]
            got: [8, 3, 4, 5, 6, 7, 9, 10, 100, 101]
     
       (compared using eql?)