Bump args from 2.3.0 to 2.3.1 in /test_utilities (#1842)

diff --git a/test_utilities/pubspec.lock b/test_utilities/pubspec.lock
index cc57d56..0bd29d2 100644
--- a/test_utilities/pubspec.lock
+++ b/test_utilities/pubspec.lock
@@ -7,7 +7,7 @@
       name: args
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.3.0"
+    version: "2.3.1"
   charcode:
     dependency: transitive
     description:
diff --git a/test_utilities/pubspec.yaml b/test_utilities/pubspec.yaml
index 7acfe93..f633b2a 100644
--- a/test_utilities/pubspec.yaml
+++ b/test_utilities/pubspec.yaml
@@ -10,6 +10,6 @@
   sdk: '>=2.2.0'
 
 dev_dependencies:
-  args: ^2.3.0
+  args: ^2.3.1
   yaml: ^3.1.0
   path: any