Switch to PEP-604 syntax in python2 stubs (#5915)

Signed-off-by: oleg.hoefling <oleg.hoefling@gmail.com>

stdlib/@python2/json.pyi

@@ -1,5 +1,5 @@
 from _typeshed import SupportsRead
-from typing import IO, Any, Callable, Dict, List, Optional, Text, Tuple, Type, Union
+from typing import IO, Any, Callable, Dict, List, Text, Tuple, Type
 
 def dumps(
     obj: Any,
@@ -7,56 +7,56 @@ def dumps(
     ensure_ascii: bool = ...,
     check_circular: bool = ...,
     allow_nan: bool = ...,
-    cls: Optional[Type[JSONEncoder]] = ...,
-    indent: Optional[int] = ...,
-    separators: Optional[Tuple[str, str]] = ...,
+    cls: Type[JSONEncoder] | None = ...,
+    indent: int | None = ...,
+    separators: Tuple[str, str] | None = ...,
     encoding: str = ...,
-    default: Optional[Callable[[Any], Any]] = ...,
+    default: Callable[[Any], Any] | None = ...,
     sort_keys: bool = ...,
     **kwds: Any,
 ) -> str: ...
 def dump(
     obj: Any,
-    fp: Union[IO[str], IO[Text]],
+    fp: IO[str] | IO[Text],
     skipkeys: bool = ...,
     ensure_ascii: bool = ...,
     check_circular: bool = ...,
     allow_nan: bool = ...,
-    cls: Optional[Type[JSONEncoder]] = ...,
-    indent: Optional[int] = ...,
-    separators: Optional[Tuple[str, str]] = ...,
+    cls: Type[JSONEncoder] | None = ...,
+    indent: int | None = ...,
+    separators: Tuple[str, str] | None = ...,
     encoding: str = ...,
-    default: Optional[Callable[[Any], Any]] = ...,
+    default: Callable[[Any], Any] | None = ...,
     sort_keys: bool = ...,
     **kwds: Any,
 ) -> None: ...
 def loads(
-    s: Union[Text, bytes],
+    s: Text | bytes,
     encoding: Any = ...,
-    cls: Optional[Type[JSONDecoder]] = ...,
-    object_hook: Optional[Callable[[Dict[Any, Any]], Any]] = ...,
-    parse_float: Optional[Callable[[str], Any]] = ...,
-    parse_int: Optional[Callable[[str], Any]] = ...,
-    parse_constant: Optional[Callable[[str], Any]] = ...,
-    object_pairs_hook: Optional[Callable[[List[Tuple[Any, Any]]], Any]] = ...,
+    cls: Type[JSONDecoder] | None = ...,
+    object_hook: Callable[[Dict[Any, Any]], Any] | None = ...,
+    parse_float: Callable[[str], Any] | None = ...,
+    parse_int: Callable[[str], Any] | None = ...,
+    parse_constant: Callable[[str], Any] | None = ...,
+    object_pairs_hook: Callable[[List[Tuple[Any, Any]]], Any] | None = ...,
     **kwds: Any,
 ) -> Any: ...
 def load(
-    fp: SupportsRead[Union[Text, bytes]],
-    encoding: Optional[str] = ...,
-    cls: Optional[Type[JSONDecoder]] = ...,
-    object_hook: Optional[Callable[[Dict[Any, Any]], Any]] = ...,
-    parse_float: Optional[Callable[[str], Any]] = ...,
-    parse_int: Optional[Callable[[str], Any]] = ...,
-    parse_constant: Optional[Callable[[str], Any]] = ...,
-    object_pairs_hook: Optional[Callable[[List[Tuple[Any, Any]]], Any]] = ...,
+    fp: SupportsRead[Text | bytes],
+    encoding: str | None = ...,
+    cls: Type[JSONDecoder] | None = ...,
+    object_hook: Callable[[Dict[Any, Any]], Any] | None = ...,
+    parse_float: Callable[[str], Any] | None = ...,
+    parse_int: Callable[[str], Any] | None = ...,
+    parse_constant: Callable[[str], Any] | None = ...,
+    object_pairs_hook: Callable[[List[Tuple[Any, Any]]], Any] | None = ...,
     **kwds: Any,
 ) -> Any: ...
 
 class JSONDecoder(object):
     def __init__(
         self,
-        encoding: Union[Text, bytes] = ...,
+        encoding: Text | bytes = ...,
         object_hook: Callable[..., Any] = ...,
         parse_float: Callable[[str], float] = ...,
         parse_int: Callable[[str], int] = ...,
@@ -64,8 +64,8 @@ class JSONDecoder(object):
         strict: bool = ...,
         object_pairs_hook: Callable[..., Any] = ...,
     ) -> None: ...
-    def decode(self, s: Union[Text, bytes], _w: Any = ...) -> Any: ...
-    def raw_decode(self, s: Union[Text, bytes], idx: int = ...) -> Tuple[Any, Any]: ...
+    def decode(self, s: Text | bytes, _w: Any = ...) -> Any: ...
+    def raw_decode(self, s: Text | bytes, idx: int = ...) -> Tuple[Any, Any]: ...
 
 class JSONEncoder(object):
     item_separator: str
@@ -75,7 +75,7 @@ class JSONEncoder(object):
     check_circular: bool
     allow_nan: bool
     sort_keys: bool
-    indent: Optional[int]
+    indent: int | None
     def __init__(
         self,
         skipkeys: bool = ...,
@@ -83,9 +83,9 @@ class JSONEncoder(object):
         check_circular: bool = ...,
         allow_nan: bool = ...,
         sort_keys: bool = ...,
-        indent: Optional[int] = ...,
-        separators: Tuple[Union[Text, bytes], Union[Text, bytes]] = ...,
-        encoding: Union[Text, bytes] = ...,
+        indent: int | None = ...,
+        separators: Tuple[Text | bytes, Text | bytes] = ...,
+        encoding: Text | bytes = ...,
         default: Callable[..., Any] = ...,
     ) -> None: ...
     def default(self, o: Any) -> Any: ...