Prep to publish frontend-server-client (#1618)

* Prep to publsh frontent-server-client

* Address CR comments

Author: Anna Gringauze

frontend_server_client/CHANGELOG.md

@@ -1,5 +1,5 @@
-## 2.1.3-dev
-
+## 2.1.3
+- Update `package:vm_service` to version `^8.0.0`
 
 ## 2.1.2
 

frontend_server_client/pubspec.yaml

@@ -1,5 +1,5 @@
 name: frontend_server_client
-version: 2.1.3-dev
+version: 2.1.3
 description: >-
   Client code to start and interact with the frontend_server compiler from the
   Dart SDK.
@@ -19,4 +19,4 @@ dev_dependencies:
   shelf_static: ^1.1.0
   test: ^1.16.0
   test_descriptor: ^2.0.0
-  vm_service: ^7.1.0
+  vm_service: ^8.0.0