Bump test from 1.21.6 to 1.21.7 in /device_doctor (#2268)

diff --git a/device_doctor/pubspec.lock b/device_doctor/pubspec.lock
index 51e0c51..eec169e 100644
--- a/device_doctor/pubspec.lock
+++ b/device_doctor/pubspec.lock
@@ -420,21 +420,21 @@
       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"
   timing:
     dependency: transitive
     description: