[test] allow the latest version of pkg:shelf_web_socket (#2457)

Prepare to publish

Author: kevmoo

pkgs/test/CHANGELOG.md

@@ -1,4 +1,6 @@
-## 1.25.15-wip
+## 1.25.15
+
+* Allow the latest version of `package:shelf_web_socket`.
 
 ## 1.25.14
 

pkgs/test/pubspec.yaml

@@ -1,5 +1,5 @@
 name: test
-version: 1.25.15-wip
+version: 1.25.15
 description: >-
   A full featured library for writing and running Dart tests across platforms.
 repository: https://github.com/dart-lang/test/tree/master/pkgs/test
@@ -30,7 +30,7 @@ dependencies:
   shelf: ^1.0.0
   shelf_packages_handler: ^3.0.0
   shelf_static: ^1.0.0
-  shelf_web_socket: '>=1.0.0 <3.0.0'
+  shelf_web_socket: '>=1.0.0 <4.0.0'
   source_span: ^1.8.0
   stack_trace: ^1.10.0
   stream_channel: ^2.1.0