[infra] Run all migrated co19 tests on nnbd configurations

co19 test migration has started, and these tests will be unskipped
folder by folder now.

Change-Id: I7dad1a97d1a676042512a8a19e1403849e039f97
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149002
Reviewed-by: William Hesse <whesse@google.com>

https://dart.googlesource.com/sdk/+/42c3d2175655193d225d7b67a7355f0c1ae1d9c3
diff --git a/commits.json b/commits.json
index e45d2ba..f47b67b 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
   "external/github.com/flutter/engine":"c5d012900f7db0dc5dc9afb46f76d16b87915db0",
   "external/github.com/flutter/flutter":"a1636b6fef2ebe7840ba6dc1b3f9d77095ef3b45",
-  "sdk":"26c1dec7ae2980395f44e7cf8fc9a14755c9f60a"
+  "sdk":"42c3d2175655193d225d7b67a7355f0c1ae1d9c3"
 }
\ No newline at end of file