add back electron-webpack

electron-builder.json

@@ -5,11 +5,6 @@
     "output": "dist/electron"
   },
   "files": [
-    {
-      "from": "dist/electron/ui",
-      "to": "./",
-      "filter": ["!dist/!electron/ui/**/*"]
-    },
     {
       "from": "dist/electron/webpack",
       "to": "./",

package.json

@@ -97,6 +97,7 @@
     "electron-builder": "^21.2.0",
     "electron-devtools-installer": "^2.2.4",
     "electron-is-dev": "^0.3.0",
+    "electron-webpack": "^2.7.4",
     "electron-window-state": "^4.1.1",
     "eslint": "^5.15.2",
     "eslint-config-prettier": "^2.9.0",