Upgrade spf13/viper (#2754)

Build tags enforce use go gopkgk.in/yaml/v3 instead of v2

cmd/setup_test.go

@@ -0,0 +1,37 @@
+package cmd
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/evcc-io/evcc/api"
+	"github.com/evcc-io/evcc/core"
+	"github.com/evcc-io/evcc/util"
+	"github.com/spf13/viper"
+)
+
+const sample = `
+loadpoints:
+- mode: off
+`
+
+func TestYamlOff(t *testing.T) {
+	var conf config
+	viper.SetConfigType("yaml")
+	if err := viper.ReadConfig(strings.NewReader(sample)); err != nil {
+		t.Error(err)
+	}
+
+	if err := viper.UnmarshalExact(&conf); err != nil {
+		t.Error(err)
+	}
+
+	var lp core.LoadPoint
+	if err := util.DecodeOther(conf.LoadPoints[0], &lp); err != nil {
+		t.Error(err)
+	}
+
+	if lp.Mode != api.ModeOff {
+		t.Errorf("expected `off`, got %s", lp.Mode)
+	}
+}