Adding weighted moving average

[AkshatGiri]

Weighted Moving Average Checklist

• Indicator is documented and implemented by extending BigIndicatorSeries
• A "faster" version of this indicator is implemented by extending NumberIndicatorSeries
• Tests for getResult are present
• Tests for highest and lowest result caching are present (if not already existent for base class)
• Tests for error handling are present (if not already existent for base class)
• Indicators (standard & faster version) are exposed in src/index.ts
• Indicators (standard & faster version) are added to startBenchmark.ts
• Indicator is listed in README.md

Feature requested in discussion - #674

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (ebb6c01) to head (56d88ce).
Report is 59 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##              main      #677    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files           36        37     +1     
  Lines         2290      2538   +248     
  Branches       248       304    +56     
==========================================
+ Hits          2290      2538   +248     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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[bennycode]

Thank you very much for your contribution @AkshatGiri! 👏

I verified that the output from WMA & WSMA are different and I also fixed a little issue with the caching of the lowest & highest result: #684

You can use WMA now in [email protected].

Let me know how it goes! 💫

Best,
Benny

[AkshatGiri]

Thanks for the quick merge @bennycode