fix generate package name
package grpc
-//go:generate go run github.com/vektra/mockery/cmd/mockery -name RPCClient -filename=mock_client_test.go -structname=MockRPCClient -output=. -outpkg=client_test
+//go:generate go run github.com/vektra/mockery/cmd/mockery -name RPCClient -filename=mock_client_test.go -structname=MockRPCClient -output=. -outpkg=grpc_test
import (
"context"
