https://github.com/gatsbyjs/gatsby/issues/21126

gatsby-node.js

const fs = require('fs')
const path = require('path')

const toUpperCase = ([first, ...rest]) => [first.toUpperCase(), ...rest].join('')

exports.sourceNodes = ({ actions, createContentDigest, store }) => {

  const { directory } = store.getState().program

  const raw = fs.readFileSync(path.join(directory, 'package.json'))
  const content = JSON.parse(raw)

  ;['dependencies', 'devDependencies'].forEach(field => {
    const newFieldName = 'all' + toUpperCase(field)
    content[newFieldName] = Object
      .keys(content[field])
      .map(key => ({ name: key, version: content[field][key] }))
  })

  actions.createNode({
    ...content,
    id: 'package-json',
    internal: {
      contentDigest: createContentDigest(content),
      type: 'PackageJson',
    },
  })
}

/**
 localhost:8000/___graphql
 
 {
  packageJson {
    allDependencies {
    	name
      version
    }
    allDevDependencies {
      name
      version
    }
  }
}

 */