build(deps): bump github.com/xanzy/go-gitlab from 0.20.0 to 0.21.0

dependabot-preview[bot] created

Bumps [github.com/xanzy/go-gitlab](https://github.com/xanzy/go-gitlab) from 0.20.0 to 0.21.0.
- [Release notes](https://github.com/xanzy/go-gitlab/releases)
- [Changelog](https://github.com/xanzy/go-gitlab/blob/master/CHANGELOG.md)
- [Commits](https://github.com/xanzy/go-gitlab/compare/v0.20.0...v0.21.0)

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

Change summary

Gopkg.lock | 6 +++---
Gopkg.toml | 2 +-
2 files changed, 4 insertions(+), 4 deletions(-)

Detailed changes

Gopkg.lock 🔗

@@ -345,12 +345,12 @@
   version = "v1.0.0"
 
 [[projects]]
-  digest = "1:4df0865c985d97d4b9a0167cd4479ae65771b311eb01129d327b18c36cd2cdbc"
+  digest = "1:766db8705204fd893db77ff5fde228362fbceac616b87ccb9976518095aac8ce"
   name = "github.com/xanzy/go-gitlab"
   packages = ["."]
   pruneopts = "UT"
-  revision = "fcd8d439c0592fd6f8720585994e7e10323be78a"
-  version = "v0.20.0"
+  revision = "87a6b9db49fa4bd6efeaeec450b0c5661f94fcb5"
+  version = "v0.21.0"
 
 [[projects]]
   branch = "master"

Gopkg.toml 🔗

@@ -74,7 +74,7 @@
 
 [[constraint]]
   name = "github.com/xanzy/go-gitlab"
-  version = "0.20.0"
+  version = "0.21.0"
 
 [[constraint]]
   branch = "master"