Simplify configuration

[eliperelman]

• No more need to return configuration
• No more need for presets to merge configuration
• No special API to extend a preset; simply call it with a Neutrino instance
• No more need for presets to instantiate webpack-chain
• No more dual configuration API when configuring and responding to events
• Config from package.json no longer matches webpack config, but rather, maps to merge-able webpack-chain object
• Switched from Uglify to Babili since babel-preset-env won't convert backticks to strings in web preset without breaking Uglify

Preset API

• Configuration

module.exports = neutrino => {
  // modify Neutrino configuration instance
  neutrino.config...
}

• Configuration with extending

const otherPreset = require('neutrino-preset-something');

module.exports = neutrino => {
  otherPreset(neutrino);

  // modify Neutrino configuration instance
  neutrino.config...
};

• Configuration "schema" for package.json (will be converted into something usable by webpack-chain)

Note that while webpack-chain can take plugin from a config object, we can't do this from JSON, so it's not in Neutrino.

{
  "config": {
    "neutrino": {
      "target": "web",
      "output": {
        "publicPath": "./"
      },
      "node": {
        "console": false
      },
      "resolve": {
        "extensions": [".jsx"]
      },
      "resolveLoader": {
        "modules": ["./modules"]
      },
      "devServer": {
        "port": 4500
      },
      "entry": {
        "vendor": [
          "react"
        ]
      },
      "module": {
        "rule": {
          "compile": {
            "loader": {
              "babel": {
                "loader": "babel-loader",
                "options": {}
              }
            }
          }
        }
      }
    }
  }
}