chore(deps): bump github.com/stretchr/testify from 1.8.2 to 1.8.3 (#395)

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.8.2 to 1.8.3.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](https://github.com/stretchr/testify/compare/v1.8.2...v1.8.3)

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

go.mod

@@ -13,7 +13,7 @@ require (
 	github.com/muhlemmer/gu v0.3.1
 	github.com/rs/cors v1.9.0
 	github.com/sirupsen/logrus v1.9.1
-	github.com/stretchr/testify v1.8.2
+	github.com/stretchr/testify v1.8.3
 	golang.org/x/oauth2 v0.8.0
 	golang.org/x/text v0.9.0
 	gopkg.in/square/go-jose.v2 v2.6.0