CHANGELOG in prometheus_exporter-0.3.4 vs CHANGELOG in prometheus_exporter-0.4.0

@@ -1,4 +1,11 @@
+0.4.0 - 23-10-2018
+
+- Feature: histogram support
+- Feature: custom quantile support for summary
+- Feature: Puma metrics
+- Fix: delayed job metrics
+
 0.3.4 - 02-10-2018
 
 - Fix: custom collector via CLI was not working correctly
 
 0.3.3