message: tweak(env): remove unnecessary `window`.
diff: @@ -98,10 +98,10 @@ function detect(ua: string, env: Env) {
  // edge
  || browser.edge
  // webkit
  - || (('WebKitCSSMatrix' in window) && ('m11' in new window.WebKitCSSMatrix()))
  + || (('WebKitCSSMatrix' in window) && ('m11' in new WebKitCSSMatrix()))
  // gecko-based browsers
  - || 'MozPerspective' in style)
  - // Opera supports CSS transforms after version 12
  + || 'MozPerspective' in style
  + ) // Opera supports CSS transforms after version 12
  && !('OTransition' in style);
  }
  