Bump github.com/go-micro/plugins/v4/registry/consul from 1.2.0 to 1.2.1

Bumps [github.com/go-micro/plugins/v4/registry/consul](https://github.com/go-micro/plugins) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/go-micro/plugins/releases)
- [Commits](https://github.com/go-micro/plugins/compare/v4/auth/jwt/v1.2.0...v4/logger/zap/v1.2.1)

---
updated-dependencies:
- dependency-name: github.com/go-micro/plugins/v4/registry/consul
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

vendor/github.com/go-micro/plugins/v4/registry/consul/watcher.go

@@ -47,7 +47,7 @@ func newConsulWatcher(cr *consulRegistry, opts ...registry.WatchOption) (registr
 		return nil, err
 	}
 
-	wp.Handler = cw.handle
+	wp.Handler = cw.serviceHandler
 	go wp.RunWithClientAndHclog(cr.Client(), wp.Logger)
 	cw.wp = wp
 
@@ -184,6 +184,15 @@ func (cw *consulWatcher) serviceHandler(idx uint64, data interface{}) {
 		}
 	}
 
+	// there are no services in the service, empty all services
+	if len(rservices) != 0 && serviceName == "" {
+		for _, services := range rservices {
+			for _, service := range services {
+				cw.next <- &registry.Result{Action: "delete", Service: service}
+			}
+		}
+	}
+
 	cw.Lock()
 	cw.services[serviceName] = newServices
 	cw.Unlock()