Bump pub

Contains a single commit:

```
 0402c467 Recommend running `flutter pub` instead of `dart pub` when running from inside flutter. (#2842)
```

Change-Id: Icb89708a16631a99157428ac7e0d04fc29524d49
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/180569
Commit-Queue: Sigurd Meldgaard <sigurdm@google.com>
Reviewed-by: Jonas Jensen <jonasfj@google.com>
diff --git a/DEPS b/DEPS
index 2ec4a05..32a1981 100644
--- a/DEPS
+++ b/DEPS
@@ -133,7 +133,7 @@
   "ply_rev": "604b32590ffad5cbb82e4afef1d305512d06ae93",
   "pool_rev": "7abe634002a1ba8a0928eded086062f1307ccfae",
   "protobuf_rev": "0d03fd588df69e9863e2a2efc0059dee8f18d5b2",
-  "pub_rev": "267fb68add3b85a0f6698bf5ae2648f1a1df515b",
+  "pub_rev": "0402c467547daa5886352cb315338ae54552d21c",
   "pub_semver_rev": "10569a1e867e909cf5db201f73118020453e5db8",
   "resource_rev": "6b79867d0becf5395e5819a75720963b8298e9a7",
   "root_certificates_rev": "7e5ec82c99677a2e5b95ce296c4d68b0d3378ed8",