### Summary: Screen reader users cannot interact with any modal content because aria-hidden=true is incorrectly placed on the body tag. ### Steps to reproduce: 1. Open a test modal, https://reactcommunity.org/react-modal/examples/minimal.html. 2. Activate modal dialog. 3. Check that aria-hidden=true is incorrectly placed on the body tag of the modal's html document. ### Expected behavior: Screen reader user is trapped inside the modal dialog. ### Actual behavior: Screen reader user can't interact with anything on the page at all because of aria-hidden=true on the body.