fix pep484 issue for most recent mypy

zzzeek · zzzeek · commit 0b0c3a6e2660 · 2026-05-31T09:47:05.000-04:00
Change-Id: I1d5f657121914b091c5c3c70e24841d2036256a2
diff --git a/alembic/runtime/plugins.py b/alembic/runtime/plugins.py
@@ -15,7 +15,7 @@
 if TYPE_CHECKING:
     from ..util import PriorityDispatchResult
 
-_all_plugins = {}
+_all_plugins: dict[str, Plugin] = {}
 
 
 log = logging.getLogger(__name__)
