Added Changelogs (#86)

* Added changelogs

* Update for tagging

* Minor

Changelog.md

@@ -1,10 +1,31 @@
 # Changelog
 
-## Changes from 0.3 to 0.4
+The change log describes what is "Added", "Removed", "Changed" or "Fixed" between each release. 
+
+## UNRELEASED
+
+## 0.4.2
+
+### Changed
+
+* Updated version for integration tests
+* Made `TaggablePSR6PoolAdapter::getTags` protected instead of private
+
+## 0.4.1
+
+### Fixed
+
+* Saving an expired value should be the same as removing that value
+
+## 0.4.0
 
 This is a big BC break. The API is rewritten and how we store tags has changed. Each tag is a key to a list in the 
 cache storage. The list contains keys to items that uses that tag. 
 
 * The `TaggableItemInterface` is completely rewritten. It extends `CacheItemInterface` and has three methods: `getTags`, `setTags` and `addTag`.
 * The `TaggablePoolInterface` is also rewritten. It has a new `clearTags` function. 
-* The `TaggablePoolTrait` has new methods to manipulate the list of tags. 
+* The `TaggablePoolTrait` has new methods to manipulate the list of tags. 
+
+## 0.3.1 
+
+No changelog before this version