bf1287c null-annotate lerp.dart, annotations.dart, channel_buffers.dart, hash_codes.dart (flutter/engine#18348)

engine-flutter-autoroll · engine-flutter-autoroll · commit 2d5ce1cd407f · 2020-05-14T21:27:44.000Z
diff --git a/bin/internal/engine.version b/bin/internal/engine.version
@@ -1 +1 @@
-dc93db5ab858c3812ed49aaf8f0df85422b6a7e1
+bf1287c120399c48c06f539b8c3791af65f05b84
