The versions of major tooling dependencies, shelf, test, dwds, vm_service are currently stuck due to the flutter_tools pin of mockito. Mockito was pinned to 4.1.1 to avoid needing to add more dependencies on code generation libraries, and eventually to avoid needing codegen for mockito tests.

The flutter_tool is the last user of mockito, but it will be several more months until we have completed migration off of mockito.

See also:

• Provide a non-codegen mockito release with updated test_api dependency. dart-lang/mockito#352
• Expand test_api dep to allow test_api 0.3.x dart-lang/mockito#353