build(deps): bump xmldom, node-appc and titanium

Removes [xmldom](https://github.com/xmldom/xmldom). It's no longer used after updating ancestor dependencies [xmldom](https://github.com/xmldom/xmldom), [node-appc](https://github.com/tidev/node-appc) and [titanium](https://github.com/tidev/titanium). These dependencies need to be updated together.


Removes `xmldom`

Updates `node-appc` from 0.2.48 to 1.1.6
- [Release notes](https://github.com/tidev/node-appc/releases)
- [Changelog](https://github.com/tidev/node-appc/blob/master/CHANGELOG.md)
- [Commits](tidev/node-appc@0.2.48...v1.1.6)

Updates `titanium` from 5.2.2 to 5.4.1
- [Release notes](https://github.com/tidev/titanium/releases)
- [Changelog](https://github.com/tidev/titanium-cli/blob/master/CHANGELOG.md)
- [Commits](tidev/titanium-cli@5.2.2...5.4.1)

---
updated-dependencies:
- dependency-name: xmldom
  dependency-type: indirect
- dependency-name: node-appc
  dependency-type: direct:development
- dependency-name: titanium
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>