[#185] Update SDK to support new tree/pool version

Signed-off-by: Marina Biryukova <m.biryukova@yadro.com>

docs/gate-configuration.md

@@ -344,9 +344,9 @@ cache:
 ```
 
 | Parameter | Type                              | Default value                   | Description                                                               |
-|-----------|-----------------------------------|---------------------------------|-------------------------------------------------------------|
+|-----------|-----------------------------------|---------------------------------|---------------------------------------------------------------------------|
 | `buckets` | [Cache config](#cache-subsection) | `lifetime: 60s`<br>`size: 1000` | Cache which contains mapping of bucket name to bucket info.               |
-| `netmap`  | [Cache config](#cache-subsection) | `lifetime: 1m`                  | Cache which stores netmap.                                  |
+| `netmap`  | [Cache config](#cache-subsection) | `lifetime: 1m`                  | Cache which stores netmap. `netmap.size` isn't applicable for this cache. |
 
 
 #### `cache` subsection

internal/cache/netmap.go

@@ -25,7 +25,7 @@ type (
 )
 
 const (
-	DefaultNetmapCacheLifetime = 1 * time.Minute
+	DefaultNetmapCacheLifetime = time.Minute
 	netmapCacheSize            = 1
 	netmapKey                  = "netmap"
 )