build(deps): bump github.com/containernetworking/plugins

Bumps [github.com/containernetworking/plugins](https://github.com/containernetworking/plugins) from 1.1.1 to 1.2.0.
- [Release notes](https://github.com/containernetworking/plugins/releases)
- [Commits](containernetworking/plugins@v1.1.1...v1.2.0)

---
updated-dependencies:
- dependency-name: github.com/containernetworking/plugins
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

plugins/debug/go.mod

@@ -4,5 +4,5 @@ go 1.14
 
 require (
 	github.com/containernetworking/cni v1.1.2
-	github.com/containernetworking/plugins v1.1.1
+	github.com/containernetworking/plugins v1.2.0
 )