fix(core): update

ts/smartnetwork.plugins.ts

@@ -1,4 +1,9 @@
 // native scope
+import * as os from 'os';
+
+export {
+  os
+};
 
 // @pushrocks scope
 import * as smartpromise from '@pushrocks/smartpromise';
@@ -6,9 +11,8 @@ import * as smartstring from '@pushrocks/smartstring';
 
 export { smartpromise, smartstring };
 
-// @third party scope
-import defaultGateway from 'default-gateway';
+// @third party scope 
 const speedtestNet = require('speedtest-net');
 import * as portscanner from 'portscanner';
 
-export { defaultGateway, speedtestNet, portscanner };
+export { speedtestNet, portscanner };