[#84] Add API version to neofs-node config

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

cmd/neofs-node/config.go

@@ -8,6 +8,7 @@ import (
 	"sync"
 
 	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neofs-api-go/pkg"
 	"github.com/nspcc-dev/neofs-api-go/v2/netmap"
 	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/nspcc-dev/neofs-node/misc"
@@ -90,6 +91,8 @@ type cfg struct {
 
 	key *ecdsa.PrivateKey
 
+	apiVersion *pkg.Version
+
 	cfgGRPC cfgGRPC
 
 	cfgMorph cfgMorph
@@ -206,6 +209,7 @@ func initCfg(path string) *cfg {
 		log:        log,
 		wg:         new(sync.WaitGroup),
 		key:        key,
+		apiVersion: pkg.SDKVersion(),
 		cfgAccounting: cfgAccounting{
 			scriptHash: u160Accounting,
 			fee:        util.Fixed8(viperCfg.GetInt(cfgAccountingFee)),