Update constraints in packages/devtools_app/pubspec.yaml

Author: derekxu16

packages/devtools_app/pubspec.yaml

@@ -22,7 +22,7 @@ dependencies:
   collection: ^1.15.0
   dap: ^1.1.0
   dart_service_protocol_shared: ^0.0.3
-  dds_service_extensions: ^2.0.0
+  dds_service_extensions: ^2.0.2
   devtools_app_shared:
   devtools_extensions:
   devtools_shared:
@@ -53,7 +53,7 @@ dependencies:
   stack_trace: ^1.12.0
   string_scanner: ^1.4.0
   unified_analytics: ^7.0.0
-  vm_service: '>=15.0.0 <16.0.0'
+  vm_service: ^15.0.2
   vm_service_protos: ^1.0.0
   vm_snapshot_analysis: ^0.7.6
   web: ^1.0.0