fix(add-new-hook): use es module import syntax in add-new-hook script

[czinck]

What is the current behavior, and the steps to reproduce the issue?

yarn new-hook useNewHook fails with an error on the require() lines.

What is the expected behavior?

It creates a new directory and files.

How does this PR fix the problem?

It uses the ES module import syntax, instead of cjs. It looks like this file was missed in #1472, which converted everything else to use ES module syntax.

Checklist

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• Have the tests been updated to match the changes in the PR?
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