Bump github.com/stretchr/testify from 1.7.0 to 1.8.2 (fixes #4)

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.7.0 to 1.8.2.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](https://github.com/stretchr/testify/compare/v1.7.0...v1.8.2)

Change-Id: I962d069be46eec576175365c7f485c13bace0b93

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

Signed-off-by: dependabot[bot] <support@github.com>

Change-Id: I27184c7c0a07e73fec4b83366e45c0fa91183c70
diff --git a/go.mod b/go.mod
index fee87c2..d89d8ad 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,5 @@
 
 require (
 	github.com/alecthomas/kong v0.7.1
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/stretchr/testify v1.7.0
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+	github.com/stretchr/testify v1.8.2
 )