Update storybook monorepo to v6.3.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@storybook/addon-a11y	6.2.9 -> 6.3.4
@storybook/addon-essentials	6.2.9 -> 6.3.4
@storybook/html	6.2.9 -> 6.3.4

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Release Notes

storybookjs/storybook

v6.3.4

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Maintenance

• Addon-docs: Cache DocsContext on window to prevent duplication (#​15428)

v6.3.3

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Bug Fixes

• Webpack5: Quit process after finishing a static build (#​15483)
• Addon-docs/Angular: Fix numeric args default value handling (#​15491)
• Angular: Fix circular reference not being handled in moduleMetadata (#​15410)
• Core: Fix double rebuilds by removing aggregateTimeout (#​15372)
• CLI: Fix NPM typo (#​15461)

v6.3.2

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Bug Fixes

• Essentials: Update measure and outline. Fix alt+tab issues on windows. (#​15402)
• Core: Fix decorator context update (#​15408)
• Revert "Vue3: Update args without re-mounting component" (#​15409)
• Upgrade bad release of react-docgen-typescript-plugin (#​15432)

v6.3.1

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Bug Fixes

• Core: Only use dotenv-webpack when a user has a dotenv file (#​15365)
• Essentials: Update addon measure and outline (#​15354)
• Actions: Don't override existing action args (#​15394)
• Svelte: Fix argType.type.name extraction (#​15332)
• CSF3: Genericize feature flagging and fix webpack5 (#​15375)
• Webpack5: Fix warnings typo (#​15374)
• UI: Fix navigation after no story error (#​15349)
• CSF3: Rename setup to play (#​15358)
• Upgrade dotenv-webpack to 7.0.x (#​15343)

v6.3.0

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Optimized for UI development

SB6.3 adds new UI development and testing features, while evolving with the JS ecosystem:

• 📐 Layout debugging with Measure and Outline addons
• 🔌 Reuse your stories in unit tests: Jest, Cypress & more
• 🚀 Frameworks: Angular 12 Ivy, Lit2 web components
• 🛠 Builders: Webpack5 stable, Vite community
• 📦 Packaging: Modern ESM

It also contains hundreds more fixes, features, and tweaks. Browse the changelogs matching 6.3.0-alpha.*, 6.3.0-beta.*, and 6.3.0-rc.* for the full list of changes. See Storybook 6 migration guide to upgrade from 5.x or MIGRATION.md for detailed migration instructions.

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Configuration

📅 Schedule: "before 9am on monday" (UTC).

🚦 Automerge: Disabled due to failing status checks.

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[tylersticka]

I think what we're seeing is a variation of this issue: storybookjs/storybook#15336

According to that thread, we're supposed to upgrade Webpack to version 5. That's a little outside my comfort zone so I'm unassigning myself from this PR.

[calebeby]

The build is fixed but it took longer than it should have... 👀

It might just be because it started with a fresh cache, but checking just in case

[calebeby]

After a rebuild it took ~4m which is more reasonable, it looks like it was the empty cache that made it slower.