v1.12.0

Core

💥 Breaking Changes:

• Automatically set process.env.NODE_ENV to production while bundling.

Dev

🐛 Bug Fixes:

• Fix browser isn't opened when open is set to true.

  Because webpack-dev-server doesn't use open option in Node API.
  They only use it in CLI.
  See webpack/webpack-dev-server#311#issuecomment-423873185.
  
  So, I do it myself.

💥 Breaking Changes:

• Automatically set process.env.NODE_ENV to development while running dev server.