Various updates (#206)

* Various tweaks
* Use electron-updater to update

Author: 1000ch

.github/dependabot.yml

@@ -8,12 +8,13 @@ jobs:
     strategy:
       matrix:
         node-version:
-          - 16
+          - 24
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}
+          cache: npm
       - run: npm install
       - run: npm run build --if-present
       - run: npm test