Update electron-packager, remove .dmg mac build - it’s unused

app/build/Gruntfile.js

@@ -56,7 +56,7 @@ module.exports = grunt => {
       // The Windows electron-winstaller task must be run outside of grunt
     ]);
   } else if (grunt.option('platform') === 'darwin') {
-    grunt.registerTask('build-client', ['package', 'create-mac-zip', 'create-mac-dmg']);
+    grunt.registerTask('build-client', ['package', 'create-mac-zip']);
   } else if (grunt.option('platform') === 'linux') {
     grunt.registerTask('build-client', ['package', 'create-deb-installer', 'create-rpm-installer']);
   }

app/build/tasks/create-mac-dmg.js

@@ -1,35 +0,0 @@
-const path = require('path');
-const createDMG = require('electron-installer-dmg');
-
-module.exports = grunt => {
-  grunt.registerTask('create-mac-dmg', 'Create DMG for Mailspring', function pack() {
-    const done = this.async();
-    const dmgPath = path.join(grunt.config('outputDir'), 'Mailspring.dmg');
-    createDMG({
-      appPath: path.join(
-        grunt.config('outputDir'),
-        `Mailspring-darwin-${process.arch}`,
-        'Mailspring.app'
-      ),
-      name: 'Mailspring',
-      background: path.resolve(
-        grunt.config('appDir'),
-        'build',
-        'resources',
-        'mac',
-        'DMG-background.png'
-      ),
-      icon: path.resolve(grunt.config('appDir'), 'build', 'resources', 'mac', 'mailspring.icns'),
-      overwrite: true,
-      out: grunt.config('outputDir'),
-    }).then(
-      () => {
-        grunt.log.writeln(`>> Created ${dmgPath}`);
-        done(null);
-      },
-      err => {
-        done(err);
-      }
-    );
-  });
-};

app/build/tasks/package-task.js

@@ -1,6 +1,6 @@
 /* eslint global-require: 0 */ /* eslint prefer-template: 0 */
 /* eslint quote-props: 0 */
-const packager = require('electron-packager');
+const packager = require('@electron/packager');
 const path = require('path');
 const util = require('util');
 const tmpdir = path.resolve(require('os').tmpdir(), 'nylas-build');

app/internal_packages/notifications/lib/items/update-notification.tsx

@@ -1,5 +1,5 @@
 import { localized, React } from 'mailspring-exports';
-import { ipcRenderer, remote, shell } from 'electron';
+import { ipcRenderer, shell } from 'electron';
 import { Notification } from 'mailspring-component-kit';
 import { Disposable } from 'event-kit';
 

package.json

@@ -53,8 +53,7 @@
     "chalk": "1.x.x",
     "devtron": "^1.4.0",
     "electron": "30.0.9",
-    "electron-installer-dmg": "^4.0.0",
-    "electron-packager": "17.1.x",
+    "@electron/packager": "18.3.2",
     "electron-winstaller": "5.1.x",
     "eslint": "^7.32.0",
     "eslint-config-prettier": "7.2.0",