[Issue]: 0.9devx branch

[jni]

Describe the issue

@jo-mueller @joshmoore I don't have commit rights here but I need to make a PR to a new branch for the 0.9dev series of releases. Could you make a branch off main/0.6 so that I can make a PR for 0.9dev1?

[jo-mueller]

@jni here you go! https://github.com/ome/ngff-spec/tree/0.9dev

[jo-mueller]

Maybe redirecting #87 would be a good thing to do on that occasion?

[jo-mueller]

@jni can I close this issue?

[jni]

Yup, it's made, #87 is merged, and #190 is open! 🚀