Update all Yarn dependencies (2021-05-24)

[depfu]

This is your weekly update of all Yarn dependencies. Please take a good look at what changed and the test results before merging this pull request.

What changed?

✳️ gatsby-image (3.3.0 → 3.5.0, minor) · Repo · Changelog

✳️ gatsby-plugin-feed (3.3.0 → 3.5.0, minor) · Repo · Changelog

✳️ gatsby-plugin-manifest (3.3.0 → 3.5.0, minor) · Repo · Changelog

✳️ gatsby-plugin-mdx (2.3.0 → 2.5.0, minor) · Repo · Changelog

✳️ gatsby-plugin-netlify-cms (5.3.0 → 5.5.0, minor) · Repo · Changelog

✳️ gatsby-plugin-offline (4.3.0 → 4.5.0, minor) · Repo · Changelog

✳️ gatsby-plugin-react-helmet (4.3.0 → 4.5.0, minor) · Repo · Changelog

✳️ gatsby-plugin-sharp (3.3.1 → 3.5.0, minor) · Repo · Changelog

✳️ gatsby-plugin-styled-components (4.3.0 → 4.5.0, minor) · Repo · Changelog

✳️ gatsby-remark-images (5.0.0 → 5.2.0, minor) · Repo · Changelog

✳️ gatsby-remark-prismjs (5.0.0 → 5.2.0, minor) · Repo · Changelog

✳️ gatsby-source-filesystem (3.3.0 → 3.5.0, minor) · Repo · Changelog

✳️ gatsby-transformer-remark (4.0.0 → 4.2.0, minor) · Repo · Changelog

✳️ gatsby-transformer-sharp (3.3.0 → 3.5.0, minor) · Repo · Changelog

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