Bump build_runner from 2.2.1 to 2.3.0 in /app_dart (#2212)

diff --git a/app_dart/pubspec.lock b/app_dart/pubspec.lock
index 9e9d252..834c963 100644
--- a/app_dart/pubspec.lock
+++ b/app_dart/pubspec.lock
@@ -98,7 +98,7 @@
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.1"
+    version: "2.3.0"
   build_runner_core:
     dependency: transitive
     description:
diff --git a/app_dart/pubspec.yaml b/app_dart/pubspec.yaml
index 3c5fcad..7b74999 100644
--- a/app_dart/pubspec.yaml
+++ b/app_dart/pubspec.yaml
@@ -34,7 +34,7 @@
   truncate: ^3.0.1
 
 dev_dependencies:
-  build_runner: ^2.2.1
+  build_runner: ^2.3.0
   fake_async: ^1.3.1
   flutter_lints: ^1.0.4
   json_serializable: ^6.5.0