That looks really great! Nice work Miroslav.
When you get a chance go ahead and open a pull request adding it to the docs, here:
My only bit of feedback is that I'd probably *not* use the same class name as DjangoFilterBackend.
I think you'll lose more in confusion, than you'll gain in "ease" of changing from one to the other (It's only a name change afterall).
And again, nice one - that looks really great!
I'll make sure to also add some documentation in the `DjangoFilterBackend` that prominently points your project out as an alternative option.
Cheers!
Tom