React$Component.prototype.constructor takes `Props`
React$Component.prototype.constructor takes `Props`

Summary:
I think this is what [the docs](https://facebook.github.io/react/docs/react-component.html#constructor)
imply. It does find a lot of errors, though! I think

Reviewed By: zertosh

Differential Revision: D4940555

fbshipit-source-id: 5b6abdd4b2a0b3b5642e535943ffc78c2cde9da4

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