Update d3kit v1.1.0 ==> v3.1.2 (Types 2.0)

[morphatic]

• Prefer to make your PR against the types-2.0 branch.
• The package does not provide its own types, and you can not add them.
• Test the change in your own code. (see this repo)
• Follow the advice from the readme.
• Avoid common mistakes.
• Provide a URL to documentation or source code which provides context for the suggested changes: https://github.com/twitter/d3kit/blob/master/CHANGELOG.md
• Increase the version number in the header if appropriate.

Note that strictNullChecks has been set to false in tsconfig.json because of #11365. It should be set back to true after that issue has been resolved.

[dt-bot]

d3kit/d3kit-v1.1.0.d.ts

unknown status: renamed

---

d3kit/index.d.ts

Checklist

• is correct naming convention?
  • https://www.npmjs.com/package/d3kit - https://github.com/twitter/d3kit#readme
• has a test file? (d3kit-tests.ts or d3kit-tests.tsx)
• pass the Travis CI test?