wp-now: the blueprint json schema requires both php AND wp version

[lgersman]

The wp-now docs states that wp-now can also be used for non wordpress projects.

But the blueprints schema json (https://playground.wordpress.net/blueprint-schema.json) declares that both wp and php needs to be set in property preferredVersions

...
"preferredVersions": {
  "php": "8.3",
  "wp": "latest"
},
...

It would be nice if someone could use wp-now and declare just the php version.