Expand incompleteTypes property fixes to referenced extended generics

Similar to #180, but with function parameters of the generic type:

```diff
class Component {
setState(newState: Partial | ((oldState: TState) => TState)) { }
}

+ type ClickableState = {
+ clicks: number,
+ }

- class Clickable extends Component {
+ class Clickable extends Component {
state = {
clicks: 0,
};

click() {
this.setState(oldState => ({
clicks: oldState.clicks + 1,
}));
}
}
```