Add Workers and partial ListenerHolder typing

[Andrew-Chen-Wang]

No description provided.

[gi0baro]

WSGIWorker doesn't accept websockets_enabled and opt_enabled parameters

[gi0baro]

I would add from __future__ import annotations and remove the string annotation

[Andrew-Chen-Wang]

Is future annotations in re of Protocol?

also unless i'm mistaken, the class method doesn't return the instance?

[gi0baro]

Yup, ListenerHolder.from_address returns an instance, see

granian/src/tcp.rs

Line 34 in 348d3c7

pub fn from_address(_cls: &PyType, address: &str, port: u16, backlog: i32) -> PyResult<Self> {

I commented about __future__ so you can rewrite the upper as:

class ListenerHolder:
    @classmethod
    def from_address(cls, bind_addr: str, port: int, backlog: int) -> ListenerHolder: ...