There's likely no 2.4.3 release, the next one will be 2.5.0, but as mentioned before, we haven't dropped Windows XP yet, however we also won't go out of our way to test compatibility. It's an old (and unsafe) OS, as such we will depend on people actually reporting issues and more importantly testing potential fixes.
Keep in mind, that this support will unlikely last forever, as we might potentially introduce newer features into the API, that won't work on XP (e.g. DPI handling). It's already hard enough to build software for (modern) Windows, Linux, macOS, iOS and Android that we can't really invest too much time into XP for one or two people's nostalgic experience.