feat: add stats/incr/nankurtosis

[Girish-Garg]

Resolves #5561.

Description

What is the purpose of this pull request?

This pull request:

• added incremental corrected sample excess kurtosis accumulator ignoring NaN by making a wrapper function over @stdlib/stats/incr/kurtosis main function.

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves [RFC]: add stats/incr/nankurtosis #5561

Questions

Any questions for reviewers of this pull request?

No.

Other

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Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

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@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/incr/nankurtosis	$\color{green}141/141$ $\color{green}+100.00\%$	$\color{green}7/7$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}141/141$ $\color{green}+100.00\%$

The above coverage report was generated for the changes in this PR.

[23f3001304]

/stdlib help

[stdlib-bot]

@coehemang, available slash commands include:

• /stdlib check-files - Check for required files.
• /stdlib make-commands - Print make commands for package changed in PR.
• /stdlib update-copyright-years - Update copyright header years.
• /stdlib lint-autofix - Auto-fix lint errors.
• /stdlib merge - Merge changes from develop branch into this PR.
• /stdlib rebase - Rebase this PR on top of develop branch.

[Girish-Garg]

/stdlib update-copyright-years

[kgryte]

@Girish-Garg You'll want to resolve the CI lint failure.