Fix typings in @reach/router to include innerRef

[Eyas]

https://reach.tech/router/api/Link

innerRef: func

Calls up with its inner ref for apps on React <16.4.
If using React >=16.4, use ref instead.

<Link to="./" innerRef={node => /* ... */} />

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If changing an existing definition:

• Provide a URL to documentation or source code which provides context for the suggested changes: https://reach.tech/router/api/Link
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[typescript-bot]

@Eyas Thank you for submitting this PR!

🔔 @kingdaro @xMokAx @awwit @wroughtec @chilledoj - please review this PR in the next few days. Be sure to explicitly select Approve or Request Changes in the GitHub UI so I know what's going on.

If no reviewer appears after a week, a DefinitelyTyped maintainer will review the PR instead.

[typescript-bot]

@Eyas - It appears Travis did not correctly run on this PR! /cc @RyanCavanaugh to investigate and advise.

[Eyas]

@sandersn @RyanCavanaugh Travis has been running for a day, locally, npm test has been running for an hour+.

I'm starting to think there's an infintie loop somewhere in the dependency testing, could that be?

[Eyas]

hm actually the travis link shows this completed successfully since yesterday, but still shows up here as running.

[sandersn]

Odd, because the bot removed the tag, so it also noticed that Travis succeeded.

[typescript-bot]

After 5 days, no one has reviewed the PR 😞. A maintainer will be reviewing the PR in the next few days and will either merge it or request revisions. Thank you for your patience!