Update pub to the latest

Change-Id: Ie203de0c410fbbd73ff615aec3d9cdd586a0b0e6
Reviewed-on: https://dart-review.googlesource.com/59940
Reviewed-by: Kevin Moore <kevmoo@google.com>
Commit-Queue: Nate Bosch <nbosch@google.com>
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ad7b78f..5470d8b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,9 @@
 
 #### Pub
 
+* Fix an error on `pub get` when running with Dart 2 mode and already existing
+  snapshots of executables.
+
 #### Other Tools
 
 ### Core library changes
diff --git a/DEPS b/DEPS
index 498724a..a7da2e0 100644
--- a/DEPS
+++ b/DEPS
@@ -110,7 +110,7 @@
   "ply_rev": "604b32590ffad5cbb82e4afef1d305512d06ae93",
   "pool_tag": "1.3.4",
   "protobuf_tag": "0.7.1",
-  "pub_rev": "d84173eeb03c328ed533469108ce81b11d736a80",
+  "pub_rev": "881a0c3fbe63af07dd043b3f5e6cbe74eacb377c",
   "pub_semver_tag": "1.4.1",
   "quiver_tag": "5aaa3f58c48608af5b027444d561270b53f15dbf",
   "resource_rev":"af5a5bf65511943398146cf146e466e5f0b95cb9",