* Combined Min Heap and Max Heap classes
* Added JSdoc comments and also improved tests for binary heap
* Added private methods for BinaryHeap class
* JSDoc knows that a class is a class
I assume the @class tag is for classes implemented via constructor functions, not using ES6 class syntax
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Co-authored-by: Lars Müller <34514239+appgurueu@users.noreply.github.com>
