Bring in the latest pub

Closes https://github.com/dart-lang/sdk/issues/33030
Change-Id: Ib71de5c979e9bdeca5dace501ff5436852e32a82
Reviewed-on: https://dart-review.googlesource.com/54060
Commit-Queue: Nate Bosch <nbosch@google.com>
Reviewed-by: Kevin Moore <kevmoo@google.com>
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0872c83..0758d2a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,8 @@
 
 #### Pub
 
+* Retry on 500 errors from the pub server.
+
 #### Other Tools
 
 ## 2.0.0-dev.53.0
diff --git a/DEPS b/DEPS
index dc79768..20384b9 100644
--- a/DEPS
+++ b/DEPS
@@ -114,7 +114,7 @@
   "ply_rev": "604b32590ffad5cbb82e4afef1d305512d06ae93",
   "pool_tag": "1.3.4",
   "protobuf_tag": "0.7.1",
-  "pub_rev": "2e821bff00c00889afe5200e3a33f280ce942336",
+  "pub_rev": "c61b8a3a24a7b1f931bad24b1f663e2c9a4c4354",
   "pub_semver_tag": "1.3.7",
   "quiver_tag": "5aaa3f58c48608af5b027444d561270b53f15dbf",
   "resource_rev":"af5a5bf65511943398146cf146e466e5f0b95cb9",