List cluster tasks (#140)

* vzdump api call

* struct tag fix

* replace vzdump method based on proxmox ve api

* review comment fixes

* cluster tasks api call

* add client instance to cluster task

cluster.go

@@ -49,3 +49,17 @@ func (cl *Cluster) Resources(ctx context.Context, filters ...string) (rs Cluster
 
 	return rs, cl.client.Get(ctx, u.String(), &rs)
 }
+
+func (cl *Cluster) Tasks(ctx context.Context) (Tasks, error) {
+	var tasks Tasks
+
+	if err := cl.client.Get(ctx, "/cluster/tasks", &tasks); err != nil {
+		return nil, err
+	}
+
+	for index := range tasks {
+		tasks[index].client = cl.client
+	}
+
+	return tasks, nil
+}

types.go

@@ -580,7 +580,7 @@ type VirtualMachineMoveDiskOptions struct {
 
 type UPID string
 
-type Tasks []*Tasks
+type Tasks []*Task
 type Task struct {
 	client       *Client
 	UPID         UPID