Bump github.com/stretchr/testify from 1.5.1 to 1.8.4

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.5.1 to 1.8.4.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](stretchr/testify@v1.5.1...v1.8.4)

---
updated-dependencies:
- dependency-name: github.com/stretchr/testify
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -6,9 +6,8 @@ require (
 	github.com/alibabacloud-go/debug v1.0.0
 	github.com/alibabacloud-go/tea v1.2.1
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
-	github.com/stretchr/testify v1.5.1
+	github.com/stretchr/testify v1.8.4
 	golang.org/x/net v0.17.0 // indirect
 	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
 	gopkg.in/ini.v1 v1.67.0
-	gopkg.in/yaml.v2 v2.2.8 // indirect
 )