[#140] sdk: Refactor version type

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/version_test.go

@@ -0,0 +1,31 @@
+package pkg
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestNewVersionFromV2(t *testing.T) {
+	v := NewVersion()
+
+	var mjr, mnr uint32 = 1, 2
+
+	v.SetMajor(mjr)
+	v.SetMinor(mnr)
+
+	require.Equal(t, mjr, v.GetMajor())
+	require.Equal(t, mnr, v.GetMinor())
+
+	ver := v.ToV2()
+
+	require.Equal(t, mjr, ver.GetMajor())
+	require.Equal(t, mnr, ver.GetMinor())
+}
+
+func TestSDKVersion(t *testing.T) {
+	v := SDKVersion()
+
+	require.Equal(t, uint32(sdkMjr), v.GetMajor())
+	require.Equal(t, uint32(sdkMnr), v.GetMinor())
+}