Signing

package.json

@@ -6,6 +6,7 @@
   "scripts": {
     "start": "electron index.js",
     "rebuild": "electron-rebuild",
+    "sign-mac": "electron-osx-sign out/flasher.js-darwin-x64/flasher.js.app",
     "build": "electron-packager . --all --overwrite --icon=resources/icon.ico --out=out --ignore=node_modules/electron-* && cp resources/icon.icns out/flasher.js-darwin-x64/flasher.js.app/Contents/Resources/atom.icns",
     "test": "mocha"
   },
@@ -45,6 +46,7 @@
     "electron-packager": "^7.0.3",
     "electron-prebuilt": "^0.36.9",
     "electron-rebuild": "^1.1.3",
+    "electron-osx-sign": "^0.4.0-beta4",
     "mocha": "^2.4.5"
   }
 }