Fixed is_dev using electron-is-dev

package.json

@@ -27,8 +27,8 @@
     "prettier": "prettier --write '{,!(node_modules)/}**/*.{js,jsx}'",
     "electron": "electron .",
     "electron:dev": "concurrently \"yarn start\" \"wait-on http://localhost:3000 && yarn run electron\"",
-    "pack": "yarn build && electron-builder --dir",
-    "release": "yarn build && electron-builder"
+    "pack": "ELECTRON_IS_DEV=0 yarn build && ELECTRON_IS_DEV=0 electron-builder --dir",
+    "release": "ELECTRON_IS_DEV=0 yarn build && ELECTRON_IS_DEV=0 electron-builder"
   },
   "lint-staged": {
     "*.{js,jsx}": [
@@ -64,6 +64,7 @@
     "dotenv": "4.0.0",
     "dotenv-expand": "^4.2.0",
     "electron-is": "^2.4.0",
+    "electron-is-dev": "^0.3.0",
     "electron-log": "^2.2.14",
     "electron-store": "^1.3.0",
     "electron-updater": "^2.21.1",

public/main.js

@@ -1,6 +1,9 @@
 const electron = require('electron');
 const sweet = require('sweet-electron')(electron);
 
+// Temporary fix for `sweet-electron`.is failure on `.url`
+const isDev = require('electron-is-dev');
+
 // Fix $PATH on macOS
 require('fix-path')();
 
@@ -11,8 +14,7 @@ const events = require('./window/events');
 
 sweet()
   .url(
-    is =>
-      is.dev() ? 'http://localhost:3000' : [__dirname, '../build/index.html']
+    () => (isDev ? 'http://localhost:3000' : [__dirname, '../build/index.html'])
   )
   .window(windowConfiguration)
   .menu(menu)