Bump test from 1.21.6 to 1.21.7 in /codesign (#2271)

diff --git a/codesign/pubspec.lock b/codesign/pubspec.lock
index f5e7960..0c923f5 100644
--- a/codesign/pubspec.lock
+++ b/codesign/pubspec.lock
@@ -308,21 +308,21 @@
       name: test
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.21.6"
+    version: "1.21.7"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.14"
+    version: "0.4.15"
   test_core:
     dependency: transitive
     description:
       name: test_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.18"
+    version: "0.4.19"
   typed_data:
     dependency: transitive
     description: