remove perMachine: true

Keep it simple and basic, no need to promote this unrelated configuration (also, it leads to UAC on update).

Author: develar

package.json

@@ -23,9 +23,6 @@
         "zip",
         "dmg"
       ]
-    },
-    "nsis": {
-      "perMachine": true
     }
   }
 }