[ package:vm_service ] Prepare for 14.2.4 release

Change-Id: Ibee954dcbac5f7ac592686440e3d6a7fdc83b522
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/371581
Reviewed-by: Derek Xu <derekx@google.com>
Commit-Queue: Ben Konyi <bkonyi@google.com>
Commit-Queue: Derek Xu <derekx@google.com>
Auto-Submit: Ben Konyi <bkonyi@google.com>

pkg/vm_service/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 14.2.4
+- Improved deserialization performance by utilizing a combination of `Utf8Decoder` and
+  `JsonDecoder` to avoid extra type conversions.
+
 ## 14.2.3
 - An instance of RPCError is now thrown when attempting to invoke an RPC after the
   `VmService` instance has been disposed.

pkg/vm_service/pubspec.yaml

@@ -1,5 +1,5 @@
 name: vm_service
-version: 14.2.3
+version: 14.2.4
 description: >-
   A library to communicate with a service implementing the Dart VM
   service protocol.