remove nw-sdk

Author: Rodney

package.json

@@ -18,7 +18,7 @@
   "dependencies": {
     "auto-launch": "^5.0.5",
     "js-sha256": "^0.9.0",
-    "nw": "^0.55.0-sdk",
+    "nw": "^0.55.0",
     "nw-autoupdater": "^1.1.8",
     "request": "^2.88.0",
     "sshpk": "^1.16.1"