Rename toContainReact #328
Description
toContainReact looks like an irrelevant name to me.
An instance of a component <MyComponent /> (as opposed to the component itself function MyComponent() {}) according to React core team blog should be called Element. So the name could be toContainElement, but there is already toContainMatchingElement, so it will look confusing.
Anyway, toContainReact doesn't look like an appropriate name, let's come up with a better one. Maybe toContainComponentInstance.