[deps] rev package:protobuf

This brings in ~18 new commits:

c559fe5273..050c1620a9

Change-Id: I72fddb8feae2d794c890b4ada87b170f493738f3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/331743
Reviewed-by: Ömer Ağacan <omersa@google.com>
Reviewed-by: Ben Konyi <bkonyi@google.com>
Commit-Queue: Devon Carew <devoncarew@google.com>

DEPS

@@ -167,7 +167,7 @@ vars = {
   "package_config_rev": "100533d2f836583f281c9dfa11a00d6842c176d4",
   "path_rev": "4ca27d4e88d47f2d96c3113940a97321b6aa7175",
   "pool_rev": "5ccef15fcd4690d96e22e60c3962f4c97d9430f9",
-  "protobuf_rev": "c559fe52734ef6e2389e26ec3901eaf23fd76543",
+  "protobuf_rev": "050c1620a9149fcc1bf84e36d02bb111455e453d",
   "pub_rev": "fca927ae2662204805e1646c0c0687369001a41a", # disable rev_sdk_deps.dart
   "pub_semver_rev": "8e5a58fd4231854b35ac585ff81c242885334843",
   "shelf_rev": "c15fc6f6ae11079d7796b0bf8c93135a5a112d82",

pkg/vm_service_protos/CHANGELOG.md

@@ -1,4 +1,9 @@
+## 1.0.1-wip
+
+- Widen the dependency constraint on `package:protobuf`.
+
 ## 1.0.0
+
 - Initial version
 - Add code for working with Perfetto protos, which can be imported from
   `'package:vm_service_protos/vm_service_protos.dart'`.

pkg/vm_service_protos/pubspec.yaml

@@ -1,5 +1,5 @@
 name: vm_service_protos
-version: 1.0.0
+version: 1.0.1-wip
 description: >-
   A library for decoding protos returned by a service implementing the Dart VM
   service protocol.
@@ -11,7 +11,7 @@ environment:
 
 dependencies:
   fixnum: ^1.0.0
-  protobuf: ^3.0.0
+  protobuf: '>=3.0.0 <5.0.0'
 
 # We use 'any' version constraints here as we get our package versions from
 # the dart-lang/sdk repo's DEPS file. Note that this is a special case; the