669bafe Roll Dart SDK from 9560a32779fc to 8f1a96317589 (12 revisions) (flutter/engine#21678)

engine-flutter-autoroll · engine-flutter-autoroll · commit c5dceeee2019 · 2020-10-08T18:59:35.000Z
diff --git a/bin/internal/engine.version b/bin/internal/engine.version
@@ -1 +1 @@
-85ed6567226e7c4d6f6ea456090ab43249c48682
+669bafe552b4732675d0dd5258baa2809057276f
