eslint-plugin-react-hooks version: 4.2.0

## Steps To Reproduce

I know it shouldn't exist in production code, but it's annoying while editing some files.

```js
import React, { useEffect } from "react";

const App = () => {
  useEffect(); // <-
  return null;
};

export default App;
```

Link to code example: https://codesandbox.io/s/polished-sun-3wr27?file=/src/App.js

## The current behavior

ESLint crashed.

```
TypeError: Cannot read property 'type' of undefined
```

## The expected behavior

ESLint doesn't crash but reports an error instead.
useEffect(() => {
            const handleResize = () => setState(window.innerWidth);
            window.addEventListener('resize', handleResize);
            return () => window.removeEventListener('resize', handleResize);
          });
        }
      `,
    },
    
    {
      code: normalizeIndent`
        function Example() {
          useEffect(() => {
            arguments
          }, [])
        }
      `,
    },
    {
      code: normalizeIndent`
        function Example() {
          useEffect(() => {
            const bar = () => {
              arguments;
            };
            bar();
          }, [])
        }
      `,
    },