Version 3.0.0

Major

• Updated Node.js support from v6.4+ to v7.6+.
• Express middleware now passes on errors instead of blocking, via #20.

Patch

• Using Babel directly, dropping Rollup.
• New directory structure for compiled files.
• Module files now have .mjs extension.
• No longer publish the src directory.
• No more sourcemaps.
• Use an arrow function for the Koa middleware, to match the Express middleware.
• Compiled code is now prettier.
• Prettier markdown files.
• Updated package keywords.
• Updated an Apollo documentation link in the changelog.
• Readme improvements:
  • Added links to badges.
  • Removed the inspiration links; they are less relevant to the evolved codebase.
  • Fixed an Apollo link.
  • Replaced example resolver code with a link to the Apollo upload examples.