build(deps): bump github.com/stretchr/testify from 1.7.0 to 1.7.1

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.7.0 to 1.7.1.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](https://github.com/stretchr/testify/compare/v1.7.0...v1.7.1)

go.mod

@@ -3,6 +3,6 @@ module gitlab.com/unboundsoftware/shiny/authz_client
 go 1.13
 
 require (
-	github.com/stretchr/testify v1.7.0
+	github.com/stretchr/testify v1.7.1
 	gitlab.com/sparetimecoders/goamqp v0.4.0
 )