@babel/preset-env: `DEBUG` option

Using targets:
{
  "chrome": "71"
}

Using modules transform: auto

Using plugins:
  proposal-class-static-block { chrome < 94 }
  proposal-private-property-in-object { chrome < 91 }
  proposal-class-properties { chrome < 74 }
  proposal-private-methods { chrome < 84 }
  proposal-numeric-separator { chrome < 75 }
  proposal-logical-assignment-operators { chrome < 85 }
  proposal-nullish-coalescing-operator { chrome < 80 }
  proposal-optional-chaining { chrome < 91 }
  syntax-json-strings
  syntax-optional-catch-binding
  syntax-async-generators
  syntax-object-rest-spread
  proposal-export-namespace-from { chrome < 72 }
  transform-modules-commonjs
  proposal-dynamic-import
corejs2: `DEBUG` option

Using targets: {
  "chrome": "71"
}

Using polyfills with `usage-global` method:

[<CWD>/packages/babel-preset-env/test/fixtures/debug-babel-7/usage-corejs2-proposals-chrome-71-2/input.js]
The corejs2 polyfill added the following polyfills:
  web.dom.iterable { "chrome":"71" }
