Ruleset: enforce consistent indentation of chained method calls
Ruleset: enforce consistent indentation of chained method calls

When object method calls are chained over multiple lines, indentation should always be one more or less than the previous and always at least one in from the start of the chain.

This addition enforces that.

Example of correct chain indentation:
```php
$obj->method()
    ->foo()
        ->bar()
    ->select();
```

Example of incorrect chain indentation
```php
$obj->method()
    ->foo()
                    ->bar()
        ->select();
```

Yoast/yoastcs