Bump libcompose and sync dependencies

vendor/github.com/docker/containerd/supervisor/task.go

@@ -1,33 +0,0 @@
-package supervisor
-
-import (
-	"sync"
-
-	"github.com/docker/containerd/runtime"
-)
-
-// StartResponse is the response containing a started container
-type StartResponse struct {
-	Container runtime.Container
-}
-
-// Task executes an action returning an error chan with either nil or
-// the error from executing the task
-type Task interface {
-	// ErrorCh returns a channel used to report and error from an async task
-	ErrorCh() chan error
-}
-
-type baseTask struct {
-	errCh chan error
-	mu    sync.Mutex
-}
-
-func (t *baseTask) ErrorCh() chan error {
-	t.mu.Lock()
-	defer t.mu.Unlock()
-	if t.errCh == nil {
-		t.errCh = make(chan error, 1)
-	}
-	return t.errCh
-}