Bump vm_service from 12.0.0 to 13.0.0 (#678)

Author: dependabot[bot]

pubspec.yaml

@@ -28,7 +28,7 @@ dev_dependencies:
   test: ^1.16.0
   stream_channel: ^2.1.0
   stream_transform: ^2.0.0
-  vm_service: ">=11.6.0 <13.0.0"
+  vm_service: ">=11.6.0 <14.0.0"
   fake_async: ^1.3.1
 
 false_secrets: