Update all Yarn dependencies (2019-10-16)

[depfu[bot]]

This is your daily 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 (2.2.27 → 2.2.29, patch) · Repo · Changelog

✳️ gatsby-plugin-canonical-urls (2.1.11 → 2.1.13, patch) · Repo · Changelog

✳️ gatsby-plugin-catch-links (2.1.13 → 2.1.15, patch) · Repo · Changelog

✳️ gatsby-plugin-flow (1.1.10 → 1.1.12, patch) · Repo · Changelog

✳️ gatsby-plugin-google-analytics (2.1.21 → 2.1.23, patch) · Repo · Changelog

✳️ gatsby-plugin-manifest (2.2.21 → 2.2.23, patch) · Repo · Changelog

✳️ gatsby-plugin-netlify (2.1.19 → 2.1.21, patch) · Repo · Changelog

✳️ gatsby-plugin-sitemap (2.2.17 → 2.2.19, patch) · Repo · Changelog

✳️ gatsby-plugin-styled-components (3.1.9 → 3.1.11, patch) · Repo · Changelog

✳️ gatsby-remark-images (3.1.26 → 3.1.28, patch) · Repo · Changelog

✳️ gatsby-remark-images-contentful (2.1.18 → 2.1.20, patch) · Repo · Changelog

✳️ gatsby-remark-responsive-iframe (2.2.23 → 2.2.25, patch) · Repo · Changelog

✳️ gatsby-source-contentful (2.1.47 → 2.1.49, patch) · Repo · Changelog

✳️ gatsby-source-filesystem (2.1.31 → 2.1.33, patch) · Repo · Changelog

✳️ gatsby-transformer-remark (2.6.28 → 2.6.30, patch) · Repo · Changelog

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