feat: update go.mod

Author: andrewshan

go.mod

@@ -21,7 +21,6 @@ require (
 	github.com/smartystreets/goconvey v0.0.0-20190710185942-9d28bd7c0945
 	github.com/spf13/cobra v0.0.5
 	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/stretchr/testify v1.5.1
 	go.uber.org/atomic v1.5.1
 	go.uber.org/multierr v1.4.0 // indirect
 	go.uber.org/zap v1.14.0