chore(deps): update project dependencies

[jpedroschmitz]

Changes proposed

This PR updates a few dependencies that we forgot to update on #109.

Additional context

[changeset-bot]

🦋 Changeset detected

Latest commit: eb00d23

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@rocketseat/gatsby-theme-docs-core	Major
@rocketseat/gatsby-theme-docs	Major

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Metric	Score
Performance	💚 100
Accessibility	💚 97
Best Practices	💚 100
SEO	🔶 83

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[jpedroschmitz]

Have you seen this error before @thinkybeast?

ERROR "gatsby-plugin-mdx" threw an error while running the createSchemaCustomization lifecycle:

Cannot read property 'setParserPlugins' of undefined

TypeError: Cannot read property 'setParserPlugins' of undefined

[jpedroschmitz]

Related to gatsbyjs/gatsby#33677

I'll take a look over the weekend.