Set 0.4.1-dev (#916)

Author: svchb

Project.toml

@@ -1,7 +1,7 @@
 name = "TrixiParticles"
 uuid = "66699cd8-9c01-4e9d-a059-b96c86d16b3a"
 authors = ["erik.faulhaber <44124897+efaulhaber@users.noreply.github.com>"]
-version = "0.4"
+version = "0.4.1-dev"
 
 [deps]
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"