httpx instead of requests and aiohttp

[T-256]

use less packages (and perf improvements?)

[coder2020official]

Hello, sorry for late response. The library was first built on top of requests, so therefore making hazardous changes would take us lots of time, and as a result, we had to choose: either rewriting everything from scratch using a library that supports both sync and async or just write the async version using aiohttp, and making aiohttp optional. So I sticked to the second option, knowing most users use sync version so that I had to be careful with my decisions.

[T-256]

Hello,
httpx is both sync and async client.
For now I suggest use it for just async part by dropping aiohttp and its dependencies,
One reason that could prevent do this is using server part of aiohttp (do you? I didn't noticed).

requests replacement could be happening in future.

[T-256]

I searched codebase, few lines need changes.
I can send PR if you agree with this migration.

[Badiboy]

@coder2020official See neither need nor reason to make any fundamental changes.

[coder2020official]

True