CHANGELOG.md in glimmer-dsl-libui-0.12.0 vs CHANGELOG.md in glimmer-dsl-libui-0.12.1

@@ -1,6 +1,10 @@
 # Change Log
 
+## 0.12.1
+
+- Fix issue with getting error "superclass mismatch for class Array" when `concurrent-ruby` is included in a desktop applications as it is required to load `concurrent-ruby` before `glimmer`, so now `glimmer-dsl-libui` will attempt loading `concurrent-ruby` if available or default to old behavior otherwise.
+
 ## 0.12.0
 
 - Custom Control Component Slots (containers that could accept content within different parts of a Custom Component)
 
 ## 0.11.10