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.
const references = usedDep.references;
          let id;
          let maybeCall;
          for (let i = 0; i < references.length; i++) {
            id = references[i].identifier;
            maybeCall = id.parent;
            
            while (maybeCall != null && maybeCall !== componentScope.block) {
              if (maybeCall.type === 'CallExpression') {
                const correspondingStateVariable = setStateCallSites.get(
                  maybeCall.callee,
                );
                if (correspondingStateVariable != null) {
                  if (correspondingStateVariable.name === missingDep) {
                    
                    setStateRecommendation = {
                      missingDep,
                      setter: maybeCall.callee.name,
                      form: 'updater',
                    };
                  } else if (stateVariables.has(id)) {
                    
                    setStateRecommendation = {
                      missingDep,
                      setter: maybeCall.callee.name,
                      form: 'reducer',
                    };
                  } else {
                    const resolved = references[i].resolved;
                    if (resolved != null) {