feat(project): support for node 12

[tay1orjones]

Closes #736

Summary

• Updates the package to support Node 12 (overview of changes from the Node team)
• This fixes the JavaScript heap out of memory issue with storybook that we're running into in feat(table): add tooltips to buttons and shrink icon size to 16 px, upgrade Carbon to v10.12.0 #1238 @scottdickerson

Change List (commits, features, bugs, etc)

• Update engines, vscode debugging settings, and nvmrc to Node 12.
• Updates babel deps to fix issue with Netlify builds and a dep version collision that Carbon ran into earlier this week - feat(project): update babel for Node v12.17 carbon#6148 and was also present in our dep tree.
• Remove weak as it is incompatible with Node 12, and we already have weak-napi which serves the same purpose for Jest's --detectLeaks flag.

Acceptance Test (how to verify the PR)

• Status checks should pass
• Pull down the branch, kick off a build with yarn:
• Ensure tests pass and the build outputs as expected

[scottdickerson]

LGTM

[tay1orjones]

A bit more context on this heap out of memory issue: it's a storybook issue with terser and react-docgen. It should be totally resolved in v6, but upgrading to Node 12 is a workaround.

storybookjs/storybook#6408

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[tay1orjones]

🎉 This PR is included in version 2.82.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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