<!--
  Note: if the issue is about documentation or the website, please file it at:
  https://github.com/reactjs/reactjs.org/issues/new
-->

**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.

useHook();
        };
      }
    `,
    `
      // Valid because hooks can use hooks.
      function useHookWithHook() {
        useHook();
      }
    `,
    `
      // Valid because hooks can use hooks.
      function createHook() {
        return function useHookWithHook() {
          useHook();
        }
      }
    `,
    `
      // Valid because components can call functions.
      function ComponentWithNormalFunction() {
        doSomething();
      }
    `,
    `
      // Valid because functions can call functions.
      function normalFunctionWithNormalFunction() {
        doSomething();
      }
    `,