[co19] Roll co19 to e8c8b7edab7df1a73c0215da7d458acd0f6c1ef3

2020-09-17 sgrekhov@unipro.ru int-to-double tests fixed. Added expected static warning
2020-09-17 sgrekhov@unipro.ru LibTest/html/Window/postMessage_A01_t01 test fixed to filter test runner messages
2020-09-17 sgrekhov@unipro.ru Fixes 930. Change expectations in flow analysis loops tests according to the changed spec
2020-09-16 sgrekhov@unipro.ru Fixes 935. Change expectations in flow analysis for-in tests according to the changed spec
2020-09-15 irina.arkhipets@gmail.com Fixes 916: LibTest\Spread-collections tests adopted for null safety.
2020-09-15 sgrekhov@unipro.ru Fixes 937. Expect Object? as a default least upper bound

Failures will be triaged on https://github.com/dart-lang/co19/issues/938.

Change-Id: I6c689d48d937f3ec6f43fb6f2135d52f39bdf52a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/163064
Reviewed-by: William Hesse <whesse@google.com>
diff --git a/DEPS b/DEPS
index a7b256a..5271f55 100644
--- a/DEPS
+++ b/DEPS
@@ -44,7 +44,7 @@
   # co19 is a cipd package. Use update.sh in tests/co19[_2] to update these
   # hashes. It requires access to the dart-build-access group, which EngProd
   # has.
-  "co19_rev": "ff08f2965b024a7003456deb6480170d566ace74",
+  "co19_rev": "e8c8b7edab7df1a73c0215da7d458acd0f6c1ef3",
   "co19_2_rev": "e48b3090826cf40b8037648f19d211e8eab1b4b6",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal