fix Table to respect react `key` prop

[ZigZagT]

Attempting to fix https://github.com/bvaughn/react-virtualized/issues/1725

• [x] The existing test suites (npm test) all pass
• [x] For any new features or bug fixes, both positive and negative test cases have been added
• [x] For any new features, documentation has been added
• [x] For any documentation changes, the text has been proofread and is clear to both experienced users and beginners.
• [x] Format your code with prettier (yarn run prettier).
• [x] Run the Flow typechecks (yarn run typecheck).

[ZigZagT]

@bvaughn Can we get this fix merged (or closed)? I know this project is not actively worked on anymore, yet it still will be nice to get this fix to make life easier for some folks (like us) :)

[ZigZagT]

closing due to no response from the maintainer.