npm(dep)!: bump electron-builder@^24.12.0, bump node engine requirement & CI (#264)

* npm(dep)!: bump electron-builder@^24.12.0
* ci!: drop node version to match engine requirements

Author: erisu

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x, 16.x, 18.x]
+        node-version: [18.x]
         os: [ubuntu-latest, windows-latest, macos-latest]
 
     steps: