Feature: update JSDoc blocks upon refactoring

Example:

```
/**
 * @param who who to greet
 */
function hello(who: string) {
    return `Hello, ${who}`;
}
```

Renaming the `who` argument currently does not update the `@param who` annotation, which is then left as incorrect and no longer works.

That's just one example - it would be nice if JSDoc blocks were automatically corrected everywhere.
