Builder interfaces for MongoDB query builders in a backwards compatible way

Builder.php

<?php

namespace Doctrine\MongoDB\Builders\Query;

class Builder implements BuilderInterface, MongoDB32BuilderInterface {
    // ...
}

BuilderInterface.php

<?php

namespace Doctrine\MongoDB\Builders\Query;

interface BuilderInterface {
    public function getQuery(): Query;
}

DocumentRepository.php

<?php

namespace Doctrine\ODM\MongoDB;

use Doctrine\MongoDB\Builders\Query\BuilderInterface;

class DocumentRepository
{
    public function createQueryBuilder(): BuilderInterface;
}

MongoDB32BuilderInterface.php

<?php

namespace Doctrine\MongoDB\Builders\Query;

/**
 * Declares query operators added in MongoDB 3.2
 */
interface MongoDB32BuilderInterface {
    public function bitsAllClear($value): self;
    public function bitsAllSet($value): self;
    public function bitsAnyClear($value): self;
    public function bitsAnySet($value): self;
}