Test suit breaks when using MongoDB > 3.4

[1ma]

From the master branch, the issue can be quickly reproduced with the help of docker:

~/workspace/xhgui$ docker run -d --name mongu -p 127.0.0.1:27017:27017 mongo:3.4
c5b460442a380c50c19562dad3c7c7462b6622fc267bb82a24a152dc8b848c2b

~/workspace/xhgui$ php vendor/bin/phpunit 
PHPUnit 5.7.27 by Sebastian Bergmann and contributors.

.........IIIIII.................................................. 65 / 72 ( 90%)
.......                                                           72 / 72 (100%)

Time: 379 ms, Memory: 8.00MB

OK, but incomplete, skipped, or risky tests!
Tests: 72, Assertions: 199, Incomplete: 6.

~/workspace/xhgui$ docker rm -f -v mongu
mongu

~/workspace/xhgui$ docker run -d --name mongu -p 127.0.0.1:27017:27017 mongo:3.5
14931915d3e429eef17783c28d57505bedcd7196533754a6bb3ac72e605f5327

~/workspace/xhgui$ php vendor/bin/phpunit 
PHPUnit 5.7.27 by Sebastian Bergmann and contributors.

.........IIIIII.....................................EE........... 65 / 72 ( 90%)
.......                                                           72 / 72 (100%)

Time: 382 ms, Memory: 8.00MB

There were 2 errors:

1) ProfilesTest::testGetAvgsForUrl
MongoResultException: The 'cursor' option is required, except for aggregate with the explain argument

/home/marcel/workspace/xhgui/vendor/alcaeus/mongo-php-adapter/lib/Alcaeus/MongoDbAdapter/ExceptionConverter.php:83
/home/marcel/workspace/xhgui/vendor/alcaeus/mongo-php-adapter/lib/Mongo/MongoCollection.php:173
/home/marcel/workspace/xhgui/src/Xhgui/Profiles.php:203
/home/marcel/workspace/xhgui/tests/ProfilesTest.php:107

Caused by
MongoDB\Driver\Exception\RuntimeException: The 'cursor' option is required, except for aggregate with the explain argument

/home/marcel/workspace/xhgui/vendor/mongodb/mongodb/src/Operation/Aggregate.php:248
/home/marcel/workspace/xhgui/vendor/mongodb/mongodb/src/Collection.php:218
/home/marcel/workspace/xhgui/vendor/alcaeus/mongo-php-adapter/lib/Mongo/MongoCollection.php:165
/home/marcel/workspace/xhgui/src/Xhgui/Profiles.php:203
/home/marcel/workspace/xhgui/tests/ProfilesTest.php:107

2) ProfilesTest::testGetAvgsForUrlWithSearch
MongoResultException: The 'cursor' option is required, except for aggregate with the explain argument

/home/marcel/workspace/xhgui/vendor/alcaeus/mongo-php-adapter/lib/Alcaeus/MongoDbAdapter/ExceptionConverter.php:83
/home/marcel/workspace/xhgui/vendor/alcaeus/mongo-php-adapter/lib/Mongo/MongoCollection.php:173
/home/marcel/workspace/xhgui/src/Xhgui/Profiles.php:203
/home/marcel/workspace/xhgui/tests/ProfilesTest.php:122

Caused by
MongoDB\Driver\Exception\RuntimeException: The 'cursor' option is required, except for aggregate with the explain argument

/home/marcel/workspace/xhgui/vendor/mongodb/mongodb/src/Operation/Aggregate.php:248
/home/marcel/workspace/xhgui/vendor/mongodb/mongodb/src/Collection.php:218
/home/marcel/workspace/xhgui/vendor/alcaeus/mongo-php-adapter/lib/Mongo/MongoCollection.php:165
/home/marcel/workspace/xhgui/src/Xhgui/Profiles.php:203
/home/marcel/workspace/xhgui/tests/ProfilesTest.php:122

ERRORS!
Tests: 72, Assertions: 186, Errors: 2, Incomplete: 6.

Might be related to #221, #232