**Do you want to request a *feature* or report a *bug*?**

Bug

**What is the current behavior?**

React Native for Web was broken by 16.5 as describe [here](https://github.com/necolas/react-native-web/issues/1096) due to this change https://github.com/facebook/react/pull/13539

**What is the expected behavior?**

Release a version of React that exports the EventPluginHub.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**

Worked in 16.4
/**
   * Pass a mocked component module to this method to augment it with
   * useful methods that allow it to be used as a dummy React component.
   * Instead of rendering as usual, the component will become a simple
   * <div> containing any provided children.
   *
   * @param {object} module the mock function object exported from a
   *                        module that defines the component to be mocked
   * @param {?string} mockTagName optional dummy root tag name to return
   *                              from render method (overrides
   *                              module.mockTagName if provided)
   * @return {object} the ReactTestUtils object (for chaining)
   */
  mockComponent: function(module, mockTagName) {
    if (!hasWarnedAboutDeprecatedMockComponent) {
      hasWarnedAboutDeprecatedMockComponent = true;
      lowPriorityWarning(
        false,
        'ReactTestUtils.mockComponent() is deprecated. ' +
          'Use shallow rendering or jest.mock() instead.\n\n' +
          'See https://fb.me/test-utils-mock-component for more information.',
      );
    }
    mockTagName = mockTagName || module.mockTagName || 'div';
    module.prototype.render.mockImplementation(function() {
      return React.createElement(mockTagName, null, this.props.children);
    });
    return this;
  },
  nativeTouchData: function(x, y) {