Incorrect checking for PHP7 return types on multi-line function declartions

Hello,

With a code like that : 

```
    public function driverIsConnectedWithIdentifierForQuery(
        DriverInterface $driver,
        $identifier,
        QueryInterface $query
    ): ConnectionPool {
```

PHPCS : There must be a single space between the closing parenthesis and the opening brace of a multi-line function declaration
