Build(deps-dev): bump gatsby from 3.3.1 to 3.4.0

[dependabot-preview]

Bumps gatsby from 3.3.1 to 3.4.0.

Release notes

Sourced from gatsby's releases.

v3.4 (April 2021 #2)

Welcome to gatsby@3.4.0 release (April 2021 #2)

Key highlights of this release:

• Experimental: Enable webpack persistent caching for production builds - significantly speed up webpack compilation on subsequent builds
• Experimental: Gatsby Functions - serverless functions in Gatsby & Gatsby Cloud
• New Aggregation Resolvers - adds min(), max(), and sum() resolvers to allX queries
• Better Fast Refresh handling for styling libraries - Theme UI and Chakra UI now work correctly with Fast Refresh

Also check out notable bugfixes.

Bleeding Edge: Want to try new features as soon as possible? Install gatsby@next and let us know if you have any issues.

Previous release notes

Full changelog

Commits

• 668aa43 chore(release): Publish
• 3224803 fix(gatsby): handle case of changing page path casing on case-insensitive fs ...
• 21dc379 fix(gatsby-plugin-sharp): Handle fractional image sizes (#31057) (#31081)
• bab3b55 fix(gatsby-transformer-remark): Activate footnotes by default & remove includ...
• 3dfa9af fix(gatsby-react-router-scroll): scroll restoration for layout components (#2...
• e56f544 perf(gatsby-plugin-page-creator): De-dupe collection pages (#31016)
• 841c0d2 feat(gatsby-plugin-gatsby-cloud): add prototype of preview indicator (#30839)
• 9a4d1ae test(contentful): improve content reference snapshot tests (#31008)
• 4930aa5 fix(gatsby): Refactor overlay utils (#31005)
• 7838b18 feat(gatsby): test redirects (#31011)
• Additional commits viewable in compare view

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[calebcartwright]

Believe we're hitting the same thing as the report in gatsbyjs/gatsby#31135

[calebcartwright]

This has been fixed upstream and will be in a future release that we can grab at that time. Going to close this accordingly

[dependabot-preview]

OK, I won't notify you again about this release, but will get in touch when a new version is available.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.