[Snyk] Security upgrade gatsby from 3.12.1 to 5.4.0

[simse]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `yarn` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • docs/package.json

⚠️ Warning

Failed to update the yarn.lock, please update manually before merging.

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	589/1000 Why? Has a fix available, CVSS 7.5	Denial of Service (DoS) SNYK-JS-ENGINEIO-3136336	Yes	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Check the changes in this PR to ensure they won't cause issues with your project.

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🦉 Denial of Service (DoS)

[gatsby-cloud]

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Errors

Your plugins must export known APIs from their gatsby-node.

See https://www.gatsbyjs.com/docs/reference/config-files/gatsby-node/ for the list of Gatsby node APIs.

- The plugin gatsby-transformer-sharp@3.12.0 is using the API "unstable_shouldOnCreateNode" which is not a known API.
- The plugin gatsby-transformer-remark@4.9.0 is using the API "unstable_shouldOnCreateNode" which is not a known API.

Some of the following may help fix the error(s):

- Rename "unstable_shouldOnCreateNode" -> "shouldOnCreateNode"
- Rename "unstable_shouldOnCreateNode" -> "shouldOnCreateNode"

"gatsby-transformer-sharp" threw an error while running the createSchemaCustomization lifecycle:

Class constructor GraphQLList cannot be invoked without 'new'