List of changes in the build:
- Updates to release [1.104.0](https://github.com/pulsar-edit/pulsar/releases/tag/v1.104.0)
- Set the `pname` to small caps (fixes#225755)
- Unpacks/repacks the app.asar bundle to patch binaries for the missing libstdc++.so.6
- Fixes non-starting Pulsar encountered on non NixOS devices
- This requires adding asar (and Python3) as dependencies
- Removes the unused imports in the update script
- Made the update script CWD-independant