Bump version to 0.9.4 (#174)

This version includes:

* Fix keyed list rendering and implement LIS for reconciliation (#158)
* Support PySide drag and drop (#173)

Author: berendkleinhaneveld

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "collagraph"
-version = "0.9.3"
+version = "0.9.4"
 description = "Reactive user interfaces"
 authors = [
     { name = "Berend Klein Haneveld", email = "berendkleinhaneveld@gmail.com" },