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.
if (
        isEffect &&
        !key.endsWith('.current') &&
        !externalDependencies.has(key)
      ) {
        
        
        
        
        if (suggestedDependencies.indexOf(key) === -1) {
          suggestedDependencies.push(key);
        }
      } else {
        
        unnecessaryDependencies.add(key);
      }
    }
  });
  
  missingDependencies.forEach(key => {
    suggestedDependencies.push(key);
  });
  return {
    suggestedDependencies,
    unnecessaryDependencies,
    duplicateDependencies,
    missingDependencies,
  };
}
function getConstructionExpressionType(node) {