use electron 8 spellchecker instead of electron-spellchecker, WIP

package.json

@@ -33,7 +33,6 @@
     "electron-debug": "3.0.1",
     "electron-dl": "3.0.0",
     "electron-find": "1.0.6",
-    "electron-spellchecker": "2.2.1",
     "electron-window-state": "5.0.3",
     "express": "4.17.1",
     "express-session": "1.17.0",
@@ -75,7 +74,7 @@
     "ws": "7.2.1"
   },
   "devDependencies": {
-    "electron": "9.0.0-beta.3",
+    "electron": "9.0.0-beta.4",
     "electron-builder": "22.3.2",
     "electron-packager": "14.2.1",
     "electron-rebuild": "1.10.0",