chore(dependencies): update gatsby monorepo (minor)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
babel-preset-gatsby	devDependencies	minor	0.5.16 -> 0.6.0
gatsby (changelog)	dependencies	minor	2.24.92 -> 2.26.1
gatsby-image	dependencies	minor	2.4.21 -> 2.5.0
gatsby-plugin-catch-links	dependencies	minor	2.3.15 -> 2.4.0
gatsby-plugin-feed	dependencies	minor	2.5.20 -> 2.7.0
gatsby-plugin-react-helmet	dependencies	minor	3.3.14 -> 3.4.0
gatsby-plugin-sharp	dependencies	minor	2.6.44 -> 2.8.0
gatsby-remark-images	dependencies	minor	3.3.40 -> 3.5.1
gatsby-source-filesystem	dependencies	minor	2.3.37 -> 2.5.0
gatsby-transformer-remark	dependencies	minor	2.8.47 -> 2.10.0
gatsby-transformer-sharp	dependencies	minor	2.5.21 -> 2.6.0

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Release Notes

gatsbyjs/gatsby

v0.6.0

Compare Source

Bug fix

• Previously Gatsby was compiling the production bundle.js with source-maps inlined. @​fson noticed this and wrote a PR to fix this which reduced bundle.js size by 3x! #​48

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[frantic1048]

Cause of build error: gatsbyjs/gatsby#27437 (comment)

Retry after gatsbyjs/gatsby#27944 release.