Pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
arrify	dependencies	pin	^2.0.0 -> 2.0.1
gatsby-plugin-compile-es6-packages	dependencies	pin	^1.0.6 -> 1.1.0
gatsby-plugin-emotion	dependencies	pin	^4.0.6 -> 4.0.7
gatsby-plugin-google-analytics	dependencies	pin	^2.0.17 -> 2.0.21
gatsby-plugin-page-creator	dependencies	pin	^2.0.6 -> 2.0.13
gatsby-plugin-react-helmet	dependencies	pin	^3.0.10 -> 3.0.12
gatsby-plugin-sharp	dependencies	pin	^2.0.29 -> 2.1.5
gatsby-plugin-sitemap	dependencies	pin	^2.0.10 -> 2.1.0
gatsby-plugin-typescript	dependencies	pin	^2.0.11 -> 2.0.15
gatsby-remark-copy-linked-files	dependencies	pin	^2.0.12 -> 2.0.13
gatsby-source-filesystem	dependencies	pin	^2.0.27 -> 2.0.39
gatsby-transformer-remark	dependencies	pin	^2.3.12 -> 2.4.0
gatsby-transformer-sharp	dependencies	pin	^2.1.17 -> 2.1.21
lodash.has (source)	dependencies	pin	^4.5.2 -> 4.5.2
mkdirp	dependencies	pin	^0.5.1 -> 0.5.1
read-pkg-up	dependencies	pin	^5.0.0 -> 5.0.0
semver	dependencies	pin	^6.0.0 -> 6.1.1

📌 Important: Renovate will wait until you have merged this Pin PR before creating any upgrade PRs for the affected packages. Add the preset :preserveSemverRanges your config if you instead don't wish to pin dependencies.

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