Migrate current TOML code to github.com/pelletier/go-toml

Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>

cmd/containerd/command/config.go

@@ -22,20 +22,20 @@ import (
 	"os"
 	"path/filepath"
 
-	"github.com/BurntSushi/toml"
 	"github.com/containerd/containerd/defaults"
 	"github.com/containerd/containerd/images"
 	"github.com/containerd/containerd/pkg/timeout"
 	"github.com/containerd/containerd/services/server"
 	srvconfig "github.com/containerd/containerd/services/server/config"
 	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
+	"github.com/pelletier/go-toml"
 	"github.com/urfave/cli"
 )
 
 // Config is a wrapper of server config for printing out.
 type Config struct {
 	*srvconfig.Config
-	// Plugins overrides `Plugins map[string]toml.Primitive` in server config.
+	// Plugins overrides `Plugins map[string]toml.Tree` in server config.
 	Plugins map[string]interface{} `toml:"plugins"`
 }