Release build_runner 2.4.15. (#3846)

* Release build_runner 2.4.15.

* Update dep onto `build_resolvers`.

Author: davidmorgan

build_runner/CHANGELOG.md

@@ -1,4 +1,4 @@
-## 2.4.15-wip
+## 2.4.15
 
 - Update to package:web and dart:js_interop.
 - Support the latest `package:shelf_web_socket`.

build_runner/pubspec.yaml

@@ -1,5 +1,5 @@
 name: build_runner
-version: 2.4.15-wip
+version: 2.4.15
 description: A build system for Dart code generation and modular compilation.
 repository: https://github.com/dart-lang/build/tree/master/build_runner
 resolution: workspace
@@ -19,7 +19,7 @@ dependencies:
   build: ">=2.1.0 <2.5.0"
   build_config: ">=1.1.0 <1.2.0"
   build_daemon: ^4.0.0
-  build_resolvers: ^2.4.4-wip
+  build_resolvers: ^2.4.4
   build_runner_core: ^8.0.0
   code_builder: ^4.2.0
   collection: ^1.15.0