GitLab

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.4.0 to 1.5.1.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](https://github.com/stretchr/testify/compare/v1.4.0...v1.5.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>