Python 3.10 compatibility — the *loop* parameter was removed from Queue()

Hello there!

There is an error while trying to create a Logstash handler (via `create_tcp_handler` coroutine) using Python 3.10.1:
```
Creation of the Logstash handler failed: As of 3.10, the *loop* parameter was removed from Queue() since it is no longer necessary
```

The error can be reproduced simply by running code from the Usage section of project's Readme file:
```
import asyncio
import logging

from aiologstash import create_tcp_handler

async def init_logger():
handler = await create_tcp_handler('elk', 10515)
root = logging.getLogger()
root.setLevel(logging.DEBUG)
root.addHandler(handler)

asyncio.run(init_logger())
```

Looks like we can fix this simply by removing the `loop` parameter here:
https://github.com/aio-libs/aiologstash/blob/3ee15ee2af005dd9cb0880e5a9fad960a85658d0/aiologstash/base_handler.py#L36
and other places where class `BaseLogstashHandler` is initiated. This is not so hard (even I can do it) but I guess some check for old Python versions is required — here things go a little bit complicated for me.