no-deprecated - React.addons.TestUtils doesn't create a warning

[nirnaor]

When using React.addons.TestUtils a warning should be thrown, since the addons entry point is deprecated as of 15.5.0 (as per the official documentation)

The error that should be thrown is:
React.addons.TestUtils is deprecated since React 15.5.0, use ReactDOM.TestUtils instead.

[ljharb]

Thanks! We'll want to make sure that only throws when the version pragma is 15.5.0 or greater.

[nirnaor]

@ljharb Great. Anything I can do to help with this verification?

[ljharb]

Nope, your PR seems solid :-)