• Updated dependencies.
• Updated peer dependencies to support graphql@0.12.
• Added a clean step to builds.
• Smarter Babel config with .babelrc.js.
• Modular project structure that works better for native ESM.
• Target Node.js v6.10+ for transpilation and polyfills via package.json engines, matching the version supported by apollo-upload-server.
• Support browsers with >1% global usage (was >2%).
• Updated the readme support section.