message: Update UglifyJS docs for v3.x
diff: @@ -25,12 +25,9 @@ that maps the minified code back to the original source:
  ::
  - node_modules/uglify-js/bin/uglifyjs {input} \
  - --source-map-root={relroot}/ \
  - --source-map-url={name}.js.map \
  - --source-map={relpath}/{name}.js.map \
  - --source-map-include-sources \
  - -o {output}
  + uglifyjs app.js \
  + -o app.min.js.map \
  + --source-map url=app.min.js.map,includeSources
  Webpack
  @@ -56,6 +53,7 @@ Webpack can be configured to output source maps by editing webpack.config.js.
  }
  };
  +
  SystemJS
  ~~~~~~~~
  