Update package:vm_service dependency to ^7.0.0 (#1524)

diff --git a/pkgs/test_core/CHANGELOG.md b/pkgs/test_core/CHANGELOG.md
index 1adee3d..98a8d65 100644
--- a/pkgs/test_core/CHANGELOG.md
+++ b/pkgs/test_core/CHANGELOG.md
@@ -1,5 +1,7 @@
 ## 0.3.25-dev
 
+* Support the latest vm_service release (`7.0.0`).
+
 ## 0.3.24
 
 * Fix race condition between compilation of vm tests and the running of
diff --git a/pkgs/test_core/pubspec.yaml b/pkgs/test_core/pubspec.yaml
index d358fc0..51fc965 100644
--- a/pkgs/test_core/pubspec.yaml
+++ b/pkgs/test_core/pubspec.yaml
@@ -26,7 +26,7 @@
   source_span: ^1.8.0
   stack_trace: ^1.10.0
   stream_channel: ^2.1.0
-  vm_service: ^6.0.0
+  vm_service: ">=6.0.0 <8.0.0"
   yaml: ^3.0.0
   # matcher is tightly constrained by test_api
   matcher: any