build(deps): Bump github.com/stretchr/testify from 1.8.4 to 1.9.0 (#366)

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.8.4 to 1.9.0.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](stretchr/testify@v1.8.4...v1.9.0)

---
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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Max Lambrecht <[email protected]>

go.mod

@@ -21,7 +21,7 @@ require (
 	github.com/spf13/cobra v1.8.0
 	github.com/spiffe/go-spiffe/v2 v2.1.6
 	github.com/spiffe/spire-api-sdk v1.8.7
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
 	google.golang.org/grpc v1.63.2
 )
 

go.sum

@@ -418,8 +418,9 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/tdewolff/minify/v2 v2.12.9 h1:dvn5MtmuQ/DFMwqf5j8QhEVpPX6fi3WGImhv8RUB4zA=
 github.com/tdewolff/minify/v2 v2.12.9/go.mod h1:qOqdlDfL+7v0/fyymB+OP497nIxJYSvX4MQWA8OoiXU=
 github.com/tdewolff/parse/v2 v2.6.8 h1:mhNZXYCx//xG7Yq2e/kVLNZw4YfYmeHbhx+Zc0OvFMA=