Update Polyfills.

- Update load/array.js to include flat and flatmap methods
- Add load/object.js to include various Object methods
- Added .vscode/settings.json to avoid mangling existing formatting
14 jobs for update-polyfills in 10 minutes and 50 seconds (queued for 7 seconds)
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  Build
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jsdoor-freebsd

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syncterm-windows

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