[Snyk] Upgrade: gatsby, gatsby-plugin-emotion, gatsby-plugin-layout, gatsby-plugin-manifest, gatsby-plugin-netlify, gatsby-plugin-react-helmet, gatsby-plugin-sharp, gatsby-plugin-sitemap, gatsby-remark-autolink-headers, gatsby-remark-copy-linked-files, gatsby-remark-images, gatsby-source-filesystem, gatsby-transformer-csv, gatsby-transformer-json, gatsby-transformer-remark, gatsby-transformer-sharp#174