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**Do you want to request a *feature* or report a *bug*?**
Feature (to catch potential bugs)

**What is the current behavior?**
The react-hooks/rules-of-hooks ESLint rule catches uses of hooks in conditionals in components, but does not recognise an anonymous function wrapped in forwardRef as a component. 

The following example breaks the rules of hooks, but isn't caught by the rule:
```jsx
// This should fail
const FancyButton = React.forwardRef((props, ref) => {
  if (props.fancy) {
    useCustomHook();
  }
  return <button ref={ref}>{props.children}</button>;
});
```

**What is the expected behavior?**
The above example should be caught by react-hooks/rules-of-hooks, and raise the "React Hook "useCustomHook" is called conditionally" error.

`,
    `
      // Valid although we *could* consider these invalid.
      // But it doesn't bring much benefit since it's an immediate runtime error anyway.
      // So might as well allow it.
      Hook.use();
      Hook._use();
      Hook.useState();
      Hook._useState();
      Hook.use42();
      Hook.useHook();
      Hook.use_hook();
    `,
    `
      // Valid -- this is a regression test.
      jest.useFakeTimers();
      beforeEach(() => {
        jest.useRealTimers();
      })
    `,
    `
      // Valid because that's a false positive we've seen quite a bit.
      // This is a regression test.
      class Foo extends Component {
        render() {
          if (cond) {
            FooStore.useFeatureFlag();
          }
        }
      }