xlsx vulnerablility in fluent editable grid

[saimanepalli]

Description All versions of SheetJS CE through 0.19.2 are vulnerable to "Prototype Pollution" when reading specially crafted files. Workflows that do not read arbitrary files (for example, exporting data to spreadsheet files) are unaffected.

A non-vulnerable version cannot be found via npm, as the repository hosted on GitHub and the npm package xlsx are no longer maintained.

Issue: In our system, we exclusively use npm, and xlsx does not release new versions to npm. Please let me know how to resolve the problem.