Add MaxHeap

[kersov]

No description provided.

[trekhleb]

@okersov thank you for your PR!
Could you please fix the following:

• MinHeap must not extend MaxHip. Rather both must extend Heap.js
• All common functionality must be moved to Heap.js

[codecov-io]

Codecov Report

Merging #167 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master   #167    +/-   ##
======================================
  Coverage     100%   100%            
======================================
  Files         124    130     +6     
  Lines        2346   2451   +105     
  Branches      396    420    +24     
======================================
+ Hits         2346   2451   +105

Impacted Files	Coverage Δ
src/data-structures/heap/MinHeap.js	100% <ø> (ø)	⬆️
src/data-structures/heap/Heap.js	100% <100%> (ø)
src/data-structures/heap/MaxHeap.js	100% <100%> (ø)
...rc/algorithms/math/complex-number/ComplexNumber.js	100% <0%> (ø)	⬆️
...hms/math/fourier-transform/fastFourierTransform.js	100% <0%> (ø)
...math/fourier-transform/discreteFourierTransform.js	100% <0%> (ø)
src/algorithms/math/radian/degreeToRadian.js	100% <0%> (ø)
src/algorithms/math/radian/radianToDegree.js	100% <0%> (ø)

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[kersov]

Hello @trekhleb,
I have updated PR according to your comment. Please check it.
Also, I improved jsdoc comments a bit.

[trekhleb]

Thanks @okersov