fix: DeprecationWarning: Buffer() is deprecated

[toredash]

DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.

Issue #, if available:

Description of changes:

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[tapughose]

@toredash, thank you for the fix. we will merge your PR in next release.

[beomseoklee]

Thanks for your effort here, @toredash
We have updated our solution, and your pull request has been merged into our master branch. However, as we've merged many pull requests at this time, the source code might not exactly same as what you've done. In addition, due to our internal process, we've merged source code manually, so please understand how your effort has been merged.

You can refer to the recent changes here

[toredash]

@beomseoklee sure! you can close this PR if you want.