Bump socket.io, gatsby, gatsby-plugin-google-gtag, gatsby-plugin-image, gatsby-plugin-manifest, gatsby-plugin-mdx, gatsby-plugin-sharp, gatsby-plugin-sitemap, gatsby-plugin-styled-components, gatsby-remark-copy-linked-files, gatsby-remark-images, gatsby-source-filesystem, gatsby-transformer-json, gatsby-transformer-sharp and gatsby-plugin-netlify #450