class and properties with no spaces between them seem to be allowed

While working on applying this standard on `doctrine/orm`, we found with @SenseException that the following will not raise any error:

```php
// declarations
class Foo
{
/** @var int */
private $bar;
/** @var int */
private $baz;
}
class FooBar
{
}
```

We would expect errors about the lack of space between property declarations
and class declarations. Does anyone know of a sniff that we could integrate to
`doctrine/coding-standard` for this? @kukulich maybe?

Note that in PHP 7.4, I personally would be ok with a lack of space between property declarations when they fit on one line.