prefer github for updates

package.json

@@ -79,13 +79,13 @@
       "installerIcon": "./build/windows/icon.ico"
     },
     "publish": [
+      {
+        "provider": "github"
+      },
       {
         "provider": "bintray",
         "token": "d993c4faa708a4cba84fa3a8e822457e7298d75c",
         "component": "main"
-      },
-      {
-        "provider": "github"
       }
     ],
     "portable": {