Bump github.com/stretchr/testify from 1.8.2 to 1.8.4

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.8.2 to 1.8.4.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](https://github.com/stretchr/testify/compare/v1.8.2...v1.8.4)

Change-Id: I85795fb62a5336f421a749cc8276523e79802764

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

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

Change-Id: I684f21a4d7d72332e14aa24c3821bd3bc46ee0c7
diff --git a/go.mod b/go.mod
index ddb7739..547115b 100644
--- a/go.mod
+++ b/go.mod
@@ -4,5 +4,5 @@
 
 require (
 	github.com/alecthomas/kong v0.8.0
-	github.com/stretchr/testify v1.8.2
+	github.com/stretchr/testify v1.8.4
 )