Upgrade package:pool from 1.3.6 (1.3.6 in pubpsec.yaml) to 86fbb2cde9bbc66c8d159909d2f65a5981ea5b50 (1.4.1-dev in pubspec.yaml).

[email protected]

Change-Id: If1bc0f6e86c6b9a626888c1afccb67f9eeae7e9f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/144723
Reviewed-by: Nate Bosch <[email protected]>
Commit-Queue: David Morgan <[email protected]>

Author: davidmorgan

DEPS

@@ -115,7 +115,7 @@ vars = {
   "path_tag": "1.7.0",
   "pedantic_tag": "v1.9.0",
   "ply_rev": "604b32590ffad5cbb82e4afef1d305512d06ae93",
-  "pool_tag": "1.3.6",
+  "pool_tag": "86fbb2cde9bbc66c8d159909d2f65a5981ea5b50",
   "protobuf_rev": "3746c8fd3f2b0147623a8e3db89c3ff4330de760",
   "pub_rev": "3606265962da4248d34d352aa3d170aae4496a90",
   "pub_semver_tag": "v1.4.4",