Ensure versions are sorted in `<scope>/<package>/meta.json` file

This isn't sorted: https://jsr.io/@david/dax/meta.json

```
{"scope":"david","name":"dax","latest":"0.43.1","versions":{"0.43.1":{},"0.43.0":{},"0.41.0":{},"0.40.1":{},"0.42.0":{},"0.39.2":{},"0.40.0":{}}}
```

Probably it should be because then a binary search could be done on the versions. Maybe sorted newest to oldest (most important to least important)?