Fix typing for _SupportsRead

Author: Kijewski

CHANGELOG.md

@@ -1,8 +1,10 @@
 # Changelog
 
-**Unreleased**
+**1.7.0 (2025-10-02)**
 
 * Update for Python 3.14 and require at least 3.8 (by Edgar Ramírez, [#112](https://github.com/Kijewski/pyjson5/pull/112))
+* Update to Unicode 17.0.0 ([#117](https://github.com/Kijewski/pyjson5/pull/117))
+* Fix typing for `_SupportsRead` ([#118](https://github.com/Kijewski/pyjson5/pull/118))
 
 **1.6.9 (2025-05-12)**
 

src/pyjson5/__init__.pyi

@@ -13,10 +13,10 @@ from typing import (
     Union,
 )
 
-_Data = TypeVar("_Data")
+_Data = TypeVar("_Data", contravariant=True)
 
 class _SupportsRead(Protocol):
-    def read(self, size: int = ...) -> str: ...
+    def read(self, size: int | None = ...) -> str | bytes: ...
 
 class _SupportsWrite(Protocol[_Data]):
     def write(self, s: _Data) -> Any: ...