nats.go kv and obj store

This moves the KV backend to nats.go implementation
and adds a new experimental command "nats obj"

Signed-off-by: R.I.Pienaar <rip@devco.net>

go.mod

@@ -20,7 +20,7 @@ require (
 	github.com/klauspost/compress v1.13.4
 	github.com/nats-io/jsm.go v0.0.27-0.20211006163108-9aae04fb57e9
 	github.com/nats-io/nats-server/v2 v2.6.2-0.20211006145508-3f12216fcc34
-	github.com/nats-io/nats.go v1.12.3
+	github.com/nats-io/nats.go v1.13.1-0.20211013144704-0f47b1ceedfa
 	github.com/nats-io/nuid v1.0.1
 	github.com/prometheus/client_golang v1.11.0
 	github.com/prometheus/common v0.26.0

go.sum

@@ -118,8 +118,9 @@ github.com/nats-io/jwt/v2 v2.1.0 h1:1UbfD5g1xTdWmSeRV8bh/7u+utTiBsRtWhLl1PixZp4=
 github.com/nats-io/jwt/v2 v2.1.0/go.mod h1:0tqz9Hlu6bCBFLWAASKhE5vUA4c24L9KPUUgvwumE/k=
 github.com/nats-io/nats-server/v2 v2.6.2-0.20211006145508-3f12216fcc34 h1:Qq2jwQrv/hyU6MmYZR5NYJ6wKVwRULJpn0CoDMtMUZg=
 github.com/nats-io/nats-server/v2 v2.6.2-0.20211006145508-3f12216fcc34/go.mod h1:ubcDOPViqaQcNvJVzoX9FIDxAxyJDTItw07lqFCzC80=
-github.com/nats-io/nats.go v1.12.3 h1:te0GLbRsjtejEkZKKiuk46tbfIn6FfCSv3WWSo1+51E=
 github.com/nats-io/nats.go v1.12.3/go.mod h1:BPko4oXsySz4aSWeFgOHLZs3G4Jq4ZAyE6/zMCxRT6w=
+github.com/nats-io/nats.go v1.13.1-0.20211013144704-0f47b1ceedfa h1:wz8dAjZOLCe+lQNooGB+giVUc0VNZmvhhE8ptITjqKY=
+github.com/nats-io/nats.go v1.13.1-0.20211013144704-0f47b1ceedfa/go.mod h1:BPko4oXsySz4aSWeFgOHLZs3G4Jq4ZAyE6/zMCxRT6w=
 github.com/nats-io/nkeys v0.3.0 h1:cgM5tL53EvYRU+2YLXIK0G2mJtK12Ft9oeooSZMA2G8=
 github.com/nats-io/nkeys v0.3.0/go.mod h1:gvUNGjVcM2IPr5rCsRsC6Wb3Hr2CQAm08dsxtV6A5y4=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=