message: simplify withPlugins() call
diff: @@ -2,7 +2,7 @@ const withPlugins = require('next-compose-plugins')
  const sass = require('@zeit/next-sass')
  const mdx = require('@zeit/next-mdx')({extension: /\.mdx?$/})
  -module.exports = withPlugins([[sass], [mdx]], {
  +module.exports = withPlugins([sass, mdx], {
  pageExtensions: ['js', 'jsx', 'md', 'mdx'],
  sassLoaderOptions: {
  includePaths: ['node_modules']
  