[enzyme] fix broken usage of React.HTMLAttributes interface due to recent changes to [react]

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The interface for React.HTMLAttributes has been broken apart into multiple interfaces (as of @types/react-15.0.38), each specific to a particular DOM element type (SelectHTMLAttributes, TdHTMLAttributes, etc), and the unified interface with all of the possible DOM element attributes is now AllHTMLAttributes. When running .find() with a selector the returned object, which could be any element, has a type with the declared properties of HTMLAttributes which is now limited to only those props in common between all DOM elements. By changing the interface imported from React as the "default" collection of attributes this PR preserves the generic return type of .find() and other functions.

This is my first PR to DefinitelyTyped. I've tried to follow the template and README but if there's anything else I should do please let me know and I'll take care of it immediately.

[dt-bot]

types/enzyme/index.d.ts

to authors (@MarianPalkus @NoHomey @jwbay @huhuanming @MartynasZilinskas Cap3 (account can't be detected)). Could you review this PR?
👍 or 👎?

Checklist

• pass the Travis CI test?

[huhuanming]

LGTM 👍

[huhuanming]

👍

[typescript-bot]

Approved by a listed owner. PR appears ready to merge pending express review by a maintainer.