Merge 'dbkr/windows_signing' into v1.5.0

package.json

@@ -111,6 +111,7 @@
     "electron-builder": "^21.2.0",
     "electron-builder-squirrel-windows": "^21.2.0",
     "electron-devtools-installer": "^2.2.4",
+    "electron-notarize": "^0.1.1",
     "eslint": "^5.8.0",
     "eslint-config-google": "^0.7.1",
     "eslint-plugin-babel": "^4.1.2",
@@ -145,6 +146,7 @@
     "postcss-simple-vars": "^4.1.0",
     "postcss-strip-inline-comments": "^0.1.5",
     "rimraf": "^2.4.3",
+    "shell-escape": "^0.2.0",
     "source-map-loader": "^0.2.4",
     "webpack": "^4.23.1",
     "webpack-cli": "^3.1.2",
@@ -188,6 +190,7 @@
       "buildResources": "electron_app/build",
       "output": "electron_app/dist",
       "app": "electron_app"
-    }
+    },
+    "afterSign": "scripts/electron_afterSign.js"
   }
 }