java.lang.ClassCastException with compose-runtime 1.4.0-alpha02

[alexvanyo]

Description
Paparazzi tests fail with java.lang.ClassCastException when using compose-runtime 1.4.0-alpha02

Steps to Reproduce

• Update compose-runtime to 1.4.0-alpha02
• Try to run a Paparazzi test

Additional information:
The internals of Recomposer.kt were recently updated, which changed the type of snapshotInvalidations from a val MutableList to a var MutableSet.

Paparazzi retrieves this field by reflection and casts it to a MutableList, which causes a java.lang.ClassCastException due to the update.

[ZacSweers]

Opened a PR with a backward-compatible fix here: #650