Added Doctrine DBAL 4 support

[pschombara]

Added support for doctrine/dbal ^4.

Solves #68

[VitekSkrip]

Hi!

I forked your PR and met some problems. For example, in src/ClickHouseSchemaManager.php at line 114 need to convert prep_replace return value to integer because \Doctrine\DBAL\Schema\Column setLength expects ?int value

[pschombara]

I fixed the most of the PHPStan errors.
But one of them I don't know how to solve it for clickhouse.

---

Line ClickHouseSchemaManager.php

---

82 Method FOD\DBALClickHouse\ClickHouseSchemaManager::listTableIndexes()
should return array<string, Doctrine\DBAL\Schema\Index> but returns
array<int, Doctrine\DBAL\Schema\Index>.

[asanikovich]

@pschombara thanks you. I will update github actions, fix phpstan and prepare a new tag.

[asanikovich]

@pschombara @VitekSkrip @jochen-jung
Release https://github.com/FriendsOfDoctrine/dbal-clickhouse/releases/tag/v3.0.0 is ready.

[VitekSkrip]

Thank u a lot 🥹