fix: unittest library version up

Author: 2rebi

go.mod

@@ -2,4 +2,9 @@ module github.com/rebirthlee/golang-default
 
 go 1.16
 
-require github.com/stretchr/testify v1.5.1
+require (
+	github.com/stretchr/objx v0.3.0 // indirect
+	github.com/stretchr/testify v1.7.0
+	gopkg.in/yaml.v2 v2.2.2 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+)