[co19] Roll co19 to 642b786a850a9de5ab75ce872c98d7d560fe9fc2

2022-10-26 [email protected] dart-lang/co19#1399. Object member names are not allowed for positional fields names (dart-lang/co19#1513)
2022-10-25 [email protected] dart-lang/co19#1516.  [Records] Experimental flags added to legacy libraries (dart-lang/co19#1519)
2022-10-25 49699333+dependabot[bot]@users.noreply.github.com Bump actions/setup-java from 3.5.1 to 3.6.0 (dart-lang/co19#1517)
2022-10-24 [email protected] Fixes dart-lang/co19#1428. Subtyping. Unused variables removed from generated tests (dart-lang/co19#1514)
2022-10-24 [email protected] dart-lang/co19#1328. Excessive 'forgetType()' removed from arguments_binding_... tests (dart-lang/co19#1503)

Change-Id: I2f3b05ceaa4d0f899f5f107abd892fa73c76d62b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/266040
Reviewed-by: Alexander Thomas <[email protected]>

Author: sgrekhov

DEPS

@@ -51,7 +51,7 @@ vars = {
 
   # co19 is a cipd package. Use update.sh in tests/co19[_2] to update these
   # hashes.
-  "co19_rev": "0c2b4c60350c7e3239913b8186770e5203c18eb2",
+  "co19_rev": "642b786a850a9de5ab75ce872c98d7d560fe9fc2",
   # This line prevents conflicts when both packages are rolled simultaneously.
   "co19_2_rev": "6dc80bd1ff15d0854eaba0c7e5d606ec0ad6b3db",