Extract function doesn't preserve semantic with return statements

```ts
function foo(i: number) {
	let x = 10;
	for (let i = 0; i < 10; i++) {
		x++;
		return;
	}
}
```
- select
```ts
		x++;
		return;
```
- extract
- you get
```ts
function foo(i: number) {
	let x = 10;
	for (let i = 0; i < 10; i++) {
        x = newFunction(x);
	}
}
function newFunction(x: number) {
    x++;
    return x;
}
```
which is not sematic preserving.