better __proto__ detection

Author: fdecampredon

lib/component.js

@@ -42,10 +42,10 @@ function Component(props, context) {
 
 Component.prototype = Object.create(React.Component.prototype);
 
-if ('__proto__' in {}) {
-  Component.__proto__ = React.Component;
-} else if (typeof Object.setPrototypeOf === 'function') {
+if (typeof Object.setPrototypeOf === 'function') {
   Object.setPrototypeOf(Component, React.Component);
+} else if (Object.__proto__) {
+  Component.__proto__ = React.Component;
 } else {
   assign(Component, React.Component);
 }