Update CHANGELOG.md [ci skip] (#177)

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CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## [v0.6.2](https://github.com/scala-exercises/exercises-stdlib/tree/v0.6.2) (2020-04-27)
+
+[Full Changelog](https://github.com/scala-exercises/exercises-stdlib/compare/v0.6.1...v0.6.2)
+
 ## [v0.6.1](https://github.com/scala-exercises/exercises-stdlib/tree/v0.6.1) (2020-04-27)
 
 [Full Changelog](https://github.com/scala-exercises/exercises-stdlib/compare/v0.6.0...v0.6.1)