npx yarn-deduplicate to coalesce babel deps

[merrywhether]

Tried this while looking into the flow issues, figured I'd give you the option to include it. Feel free to close, it's only for slimming up local dev a tad.

Uses yarn-deduplicate since Yarn 1 didn't include this functionality.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 62e387f

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

[SukkaW]

Nice!