update go test case

tests/gotest/case001/case001.sh

@@ -16,6 +16,7 @@ script_dir="$(dirname $(readlink -f $0))"
 cd $script_dir
 rm -f go.*
 go mod init demotest
+go mod tidy
 go build 
 sleep 1s
 ./demotest -h $1 -p $2