Pyright: QueryParameterType does not support None for dictionary values

[cardisnotvalid]

Expected Result

QueryParameterType should allow None for dictionary values to match how _encode_params handles them during encoding.

Actual Result

QueryParameterType rejects None in dict values, causing type errors, while _encode_params accepts it at runtime.

Reproduction Steps

import niquests
from typing import Dict, Optional

params: Dict[str, Optional[str]] = {"key1": "value1", "key2": None}
encoded = niquests.PreparedRequest._encode_params(params)
print(encoded) # key1=value1

$ pyright test.py
d:\Programming\test.py
  d:\Programming\test.py:14:51 - error: Argument of type "dict[str, str | None]" cannot be assigned to parameter "data" of type "QueryParameterType | BodyFormType | IO[Unknown]" in function "_encode_params"
    Type "dict[str, str | None]" is not assignable to type "QueryParameterType | BodyFormType | IO[Unknown]"
      "dict[str, str | None]" is not assignable to "List[Tuple[str, str | List[str]]]"
      "dict[str, str | None]" is not assignable to "Mapping[str, str | List[str]]"
        Type parameter "_VT_co@Mapping" is covariant, but "str | None" is not a subtype of "str | List[str]"
          Type "str | None" is not assignable to type "str | List[str]"
            Type "None" is not assignable to type "str | List[str]"
      "dict[str, str | None]" is not assignable to "bytes"
      "dict[str, str | None]" is not assignable to "str"
    ... (reportArgumentType)
1 error, 0 warnings, 0 informations

models.py:817-823
_encode_params skips None values during encoding.

System Information

$ python -m niquests.help

{
  "charset_normalizer": {
    "version": "3.4.0"
  },
  "http1": {
    "h11": "0.14.0"
  },
  "http2": {
    "jh2": "5.0.4"
  },
  "http3": {
    "enabled": true,
    "qh3": "1.2.1"
  },
  "idna": {
    "version": "3.10"
  },
  "implementation": {
    "name": "CPython",
    "version": "3.11.9"
  },
  "niquests": {
    "version": "3.11.4"
  },
  "ocsp": {
    "enabled": true
  },
  "platform": {
    "release": "10",
    "system": "Windows"
  },
  "system_ssl": {
    "name": "OpenSSL 3.0.13 30 Jan 2024",
    "version": "300000d0"
  },
  "urllib3.future": {
    "cohabitation_version": "2.3.0",
    "version": "2.12.904"
  },
  "wassima": {
    "certifi_fallback": false,
    "enabled": true,
    "version": "1.1.5"
  },
  "websocket": {
    "enabled": false,
    "wsproto": null
  }
}

[Ousret]

You are correct. Requests historically accepted None values and discarded them silently afterward.
We improved the typing definition in #195
It look like a continuation of #118 / #119

Regards,