auto spread arrays of plugins

[thescientist13]

Type of Change

• New Feature Request
• Documentation / Website
• Improvement / Suggestion
• Bug
• Other (please clarify below)

Summary

Some Greenwood plugins return an array of plugins, and so user's have to spread the plugin itself in greenwood.config.js. Example:

import { greenwoodPluginFoo } from 'greenwood-plugin-foo';

export default {
  plugins: [
    ...greenwoodPluginFoo()
  ]
}

Details

Instead, Greenwood easily detect if this value was an array and spread it automatically, so user's wouldn't have to do this themselves, so the equivalent would now look like this

import { greenwoodPluginFoo } from 'greenwood-plugin-foo';

export default {
  plugins: [
    greenwoodPluginFoo()
  ]
}

We would also want to make sure to update our README's to remove the ... from any example docs.