[legacy-framework] Fix bug preventing use of next-compose-plugins

[flybayer]

What are the changes and their implications?

This fixes the following error:

Client:

Error: Failed to parse json from request ...

Server:

TypeError: Cannot destructure property 'defaultConfig' of 'undefined' as it is undefined.
    at /Users/simon/Code/philharmonic/node_modules/next-compose-plugins/lib/index.js:18:3
...

With a config like this:

const withPlugins = require("next-compose-plugins")
const withTM = require("next-transpile-modules")(["heroicons"])
module.exports = withPlugins([withTM], {
  webpack: (config, { buildId, dev, isServer, defaultLoaders, webpack }) => {
    // Note: we provide webpack above so you should not `require` it
    // Perform customizations to webpack config
    // Important: return the modified config
    return config
  },
  webpackDevMiddleware: (config) => {
    // Perform customizations to webpack dev middleware config
    // Important: return the modified config
    return config
  },
})

Checklist

• Tests added for changes
• PR submitted to blitzjs.com for any user facing changes