dartdev: skip 'pub outdated' check in tests

Fixes https://github.com/dart-lang/sdk/issues/42049

We should enable, and test this feature in these tests, I think.
But for now I just need the tests to start passing. I haven't wrapped
my head around how mock-y / end-to-end-y migrate_test is.

Change-Id: I7a2e2034b2a1f42b71d78f4776ee8711071f01f7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149200
Commit-Queue: Samuel Rawlins <srawlins@google.com>
Reviewed-by: Mike Fairhurst <mfairhurst@google.com>

https://dart.googlesource.com/sdk/+/2eaac80e1a968b0219793df296e38003f97ede7d
diff --git a/commits.json b/commits.json
index bf7c594..9633524 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
   "external/github.com/flutter/engine":"2376e90d91e5f579509a44fb1f69bff6cbc0c4b1",
   "external/github.com/flutter/flutter":"5663e02645a6e69fedfe8553cbe7940cbb592be9",
-  "sdk":"521acb17e477ca02d61fa89800cfdda949e362eb"
+  "sdk":"2eaac80e1a968b0219793df296e38003f97ede7d"
 }
\ No newline at end of file