<!--
  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.

useHook2 = () => { useState(); };
      ({useHook: () => { useState(); }});
      ({useHook() { useState(); }});
      const {useHook3 = () => { useState(); }} = {};
      ({useHook = () => { useState(); }} = {});
    `,
    `
      // Valid because hooks can call hooks.
      function useHook() {
        useHook1();
        useHook2();
      }
    `,
    `
      // Valid because hooks can call hooks.
      function createHook() {
        return function useHook() {
          useHook1();
          useHook2();
        };
      }
    `,
    `
      // Valid because hooks can call hooks.
      function useHook() {
        useState() && a;
      }
    `,
    `
      // Valid because hooks can call hooks.