Update dependencies and refactor the FFI calls

[iddm]

This greatly simplifies the way the API calls are done, as well as the resulting type conversion is now hidden, which greatly reduces the number of places for the change in the future.

The main change in this PR, besides updating the dependencies, is moving from one way of calling to another, as:

-unsafe { RedisModule_ReplyWithArray.unwrap()(ctx, len).into() }
+redis_call!(RedisModule_ReplyWithArray(ctx, len))

Due to the changed API in the dependencies we use, we had to change the way we call the functions everywhere. By encapsulating the logic inside of a macro like redis_call, the next time we need to do something like this, we only do it in the macro, instead of the whole project.

[MeirShpilraien]

Few small comments. My main concern is that there is a lot of changes and its hard to spot what we might have missed. This is why I believe this should be part of the next major version. And if we do that, maybe we should already mark the internal functions as pub(crate) so they will not be used from outside wrongly?

[MeirShpilraien]

👍
Let make sure this change is only added to the next major version as it contains breaking changes.