CHANGELOG.md in ruby_px-0.6.0 vs CHANGELOG.md in ruby_px-0.7.0

@@ -1,6 +1,10 @@
 # CHANGELOG
 
+## 0.7.0 (2021-03-04)
+
+- Performance in large datasets [#9](https://github.com/PopulateTools/ruby_px/pull/9)
+
 ## 0.6.0 (2020-04-28)
 
 - Nice badge with the current version
 - Added Changelog!
 - Updated dependencies