Bump webpack, gatsby-plugin-feed, gatsby, gatsby-plugin-manifest, gatsby-plugin-offline, gatsby-plugin-react-helmet, gatsby-plugin-sitemap, gatsby-plugin-typography, gatsby-remark-copy-linked-files, gatsby-remark-images, gatsby-remark-prismjs, gatsby-remark-responsive-iframe, gatsby-remark-smartypants, gatsby-source-filesystem, gatsby-transformer-remark and gatsby-transformer-sharp#35