Bump `@swc/helpers` in`@react-stately/flags` to match other packages (#6379)
* Remove `@swc/helpers` dependency from `@react-stately/flags`
Closes #6378
* Update package.json
Meet requirement for having a dep on swc helpers
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Co-authored-by: Robert Snow <snowystinger@gmail.com>
Co-authored-by: Daniel Lu <dl1644@gmail.com>