Add tarantool v3.x to the test matrix (#98)

Update test matrix

Set alias version to 0.9.x-dev

Force closing a persistent connection via StreamConnection::close()

This is necessary in cases of "out-of-sync" errors or when re-authentication
is required. How to test/reproduce:

// test_auth.php
<?php

// Run php -S localhost:8000 test_auth.php,
// then open the http://localhost:8000/?close=0 page
// and then http://localhost:8000/?close=1
// (authentication must be initiated for both requests)

declare(strict_types=1);

use Tarantool\Client\Client;
use Tarantool\Client\Middleware\AuthenticationMiddleware;

require __DIR__.'/vendor/autoload.php';

$client = Client::fromDsn('tcp://localhost:3301?persistent=true');
$client = $client->withMiddleware(new AuthenticationMiddleware('guest'));

if (isset($_REQUEST['close']) && $_REQUEST['close']) {
    $client->getHandler()->getConnection()->close();
}

$client->ping();

Update header comment

Do not rely on the "ext-ctype" dev dependency

Fix PhpUnitCompat to work on PHPUnit 8

Add a reference to benchmarks in the README.md

Fix typo in README.md

Add Criteria::[and]iteratorType