Bump serialport from 10.2.2 to 10.4.0 in /app

Bumps [serialport](https://github.com/serialport/node-serialport) from 10.2.2 to 10.4.0.
- [Release notes](https://github.com/serialport/node-serialport/releases)
- [Changelog](https://github.com/serialport/node-serialport/blob/master/CHANGELOG.md)
- [Commits](https://github.com/serialport/node-serialport/compare/v10.2.2...v10.4.0)

---
updated-dependencies:
- dependency-name: serialport
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

app/package.json

@@ -37,7 +37,7 @@
   "optionalDependencies": {
     "@tabby-gang/windows-blurbehind": "^3.0.0",
     "macos-native-processlist": "^2.0.0",
-    "serialport": "10.2.2",
+    "serialport": "10.4.0",
     "serialport-binding-webserialapi": "^1.0.3",
     "windows-native-registry": "^3.2.1",
     "windows-process-tree": "^0.3.2"