Don't use typing.Dict

I blame Copilot. :-)

Co-authored-by: Brandt Bucher <[email protected]>

Author: gvanrossum

Tools/cases_generator/generate_cases.py

@@ -213,8 +213,8 @@ def write_body(self, out: Formatter, dedent: int, cache_adjust: int = 0) -> None
 @dataclasses.dataclass
 class Component:
     instr: Instruction
-    input_mapping: typing.Dict[str, parser.StackEffect]
-    output_mapping: typing.Dict[str, parser.StackEffect]
+    input_mapping: dict[str, parser.StackEffect]
+    output_mapping: dict[str, parser.StackEffect]
 
     def write_body(self, out: Formatter, cache_adjust: int) -> None:
         with out.block(""):