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

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

snapshots/devmapper/config.go

@@ -22,9 +22,9 @@ import (
 	"fmt"
 	"os"
 
-	"github.com/BurntSushi/toml"
 	"github.com/docker/go-units"
 	"github.com/hashicorp/go-multierror"
+	"github.com/pelletier/go-toml"
 	"github.com/pkg/errors"
 )
 
@@ -56,8 +56,13 @@ func LoadConfig(path string) (*Config, error) {
 	}
 
 	config := Config{}
-	if _, err := toml.DecodeFile(path, &config); err != nil {
-		return nil, errors.Wrapf(err, "failed to unmarshal data at '%s'", path)
+	file, err := toml.LoadFile(path)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to open devmapepr TOML: %s", path)
+	}
+
+	if err := file.Unmarshal(&config); err != nil {
+		return nil, errors.Wrap(err, "failed to unmarshal devmapper TOML")
 	}
 
 	if err := config.parse(); err != nil {

snapshots/devmapper/config_test.go

@@ -23,8 +23,8 @@ import (
 	"os"
 	"testing"
 
-	"github.com/BurntSushi/toml"
 	"github.com/hashicorp/go-multierror"
+	"github.com/pelletier/go-toml"
 	"gotest.tools/v3/assert"
 	is "gotest.tools/v3/assert/cmp"
 )