Update electron to 9.0.4.

This should fix some sporadic crashing on 9.0.x-based builds.

package-lock.json

@@ -1946,9 +1946,9 @@
 			}
 		},
 		"electron": {
-			"version": "9.0.2",
-			"resolved": "https://registry.npmjs.org/electron/-/electron-9.0.2.tgz",
-			"integrity": "sha512-+a3KegLvQXVjC3b6yBWwZmtWp3tHf9ut27yORAWHO9JRFtKfNf88fi1UvTPJSW8R0sUH7ZEdzN6A95T22KGtlA==",
+			"version": "9.0.4",
+			"resolved": "https://registry.npmjs.org/electron/-/electron-9.0.4.tgz",
+			"integrity": "sha512-QzkeZNAiNB7KxcdoQKSoaiVT/GQdB4Vt0/ZZOuU8tIKABAsni2I7ztiAbUzxcsnQsqEBSfChuPuDQ5A4VbbzPg==",
 			"dev": true,
 			"requires": {
 				"@electron/get": "^1.0.1",

package.json

@@ -92,7 +92,7 @@
 		"chai": "^4.2.0",
 		"crowdin": "^3.4.2",
 		"csvjson": "^5.1.0",
-		"electron": "^9.0.2",
+		"electron": "^9.0.4",
 		"electron-builder": "^22.7.0",
 		"mocha": "^7.1.1",
 		"shx": "^0.3.2",