Bump minimist, gatsby, gatsby-plugin-favicon, gatsby-plugin-sass and mkdirp#18

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dependabot/npm_and_yarn/minimist-and-minimist-and-gatsby-and-gatsby-plugin-favicon-and-gatsby-plugin-sass-and-mkdirp-1.2.8map34/website:dependabot/npm_and_yarn/minimist-and-minimist-and-gatsby-and-gatsby-plugin-favicon-and-gatsby-plugin-sass-and-mkdirp-1.2.8Copy head branch name to clipboard