Bump gatsby from 3.6.1 to 3.15.0

[dependabot[bot]]

Bumps gatsby from 3.6.1 to 3.15.0.

Release notes

Sourced from gatsby's releases.

v3.14 (September 2021 #1)

Welcome to gatsby@3.14.0 release (September 2021 #1)

This is the final minor release for gatsby v3. Gatsby v4 beta is already published behind the next npm tag and the next stable release will be gatsby@4.0.0. See what's inside!

We will keep publishing patches for 3.14.x with hotfixes until 4.0.0 stable is published and at least several weeks after.

Key highlights of this release:

• Better UX for navigation in the middle of deployment
• New developer tools - createPages snippet in GraphiQL and new GraphQL capability
• Preparations for gatsby v4 - API deprecations; migration guide; docs
• Improvements for gatsby-source-drupal
• New home for gatsby-plugin-netlify

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

v3.13 (August 2021 #3)

Welcome to gatsby@3.13.0 release (August 2021 #3)

Key highlights of this release:

• Improved Changelogs - Better structured and easier to read
• sharp v0.29 - Reduced install size, improved encoding time, and improved AVIF image quality
• Faster Sourcing for gatsby-source-drupal - Speed up fetching data by around 4x
• webpack Caching in Development for Everyone - Activating it for all users

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

v3.12 (August 2021 #2)

Welcome to gatsby@3.12.0 release (August 2021 #2)

Key highlights of this release:

• webpack dev server caching - opt-in 20% of users
• Improvements to gatsby-source-shopify - Add compat for breaking change in Shopify's API

... (truncated)

Commits

• c1e67a2 chore(release): Publish
• 0c45654 chore: remove tracedSVG (#37093) (#37137)
• d7edf95 chore(release): Publish
• 2d00ea0 fix(gatsby-plugin-mdx): Do not leak frontmatter into page (#35859) (#35913)
• 4997d63 chore(release): Publish
• ff94ed5 fix(gatsby-plugin-mdx): don't allow JS frontmatter by default (#35830) (#35834)
• 36f21b0 chore: Removate validate-renovate from v3-latest branch (#34460)
• 1acb1bc chore(release): Publish
• 1589bd8 fix(gatsby): ensure that writing node manifests to disk does not break on Win...
• 9694010 fix(gatsby-source-drupal): Ensure all new nodes are created before creating r...
• Additional commits viewable in compare view

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