Add ast.Bytes in typing_classes _unparse

Fix "NotImplementedError: Constant(value=*)"
when defining TypedDict in alternative syntax
with literal bytes values.

pyupgrade/_plugins/typing_classes.py

@@ -38,7 +38,7 @@ def _unparse(node: ast.expr) -> str:
         else:
             slice_s = _unparse(node_slice)
         return f'{_unparse(node.value)}[{slice_s}]'
-    elif isinstance(node, ast.Str):
+    elif isinstance(node, (ast.Str, ast.Bytes)):
         return repr(node.s)
     elif isinstance(node, ast.Ellipsis):
         return '...'

tests/features/typing_classes_test.py

@@ -295,6 +295,16 @@ def test_typing_typed_dict_noop(s):
 
             id='TypedDict from dict literal',
         ),
+        pytest.param(
+            'import typing\n'
+            'D = typing.TypedDict("D", {"a": typing.Literal["b", b"c"]})\n',
+
+            'import typing\n'
+            'class D(typing.TypedDict):\n'
+            "    a: typing.Literal['b', b'c']\n",
+
+            id='with Literal of bytes',
+        ),
         pytest.param(
             'import typing\n'
             'D = typing.TypedDict("D", {"a": int}, total=False)\n',