Use flag spec version 1.1 for server-side

Author: EmilianoSanchez

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@splitsoftware/splitio",
-  "version": "10.28.1-rc.0",
+  "version": "10.28.1-rc.1",
   "description": "Split SDK",
   "files": [
     "README.md",

package.json

@@ -1 +1 @@
-export const packageVersion = '10.28.1-rc.0';
+export const packageVersion = '10.28.1-rc.1';

src/settings/defaults/version.js

@@ -6,12 +6,15 @@ import { defaults } from './defaults/node';
 import { validateStorage } from './storage/node';
 import { validateRuntime } from './runtime/node';
 
+const FLAG_SPEC_VERSION = '1.1';
+
 const params = {
   defaults,
   runtime: validateRuntime,
   storage: validateStorage,
   logger: validateLogger,
   localhost: () => LocalhostFromFile(),
+  flagSpec: () => FLAG_SPEC_VERSION
   // In Node.js the SDK ignores `config.integrations`, so a validator for integrations is not required
 };