Update changelog with new releases

Related to #35

Author: Byron

CHANGELOG.md

@@ -1,3 +1,16 @@
+### v0.5.0 and v0.6.0
+
+Maintenance release without any new features.
+
+These are created to account for breaking changes within the dependency graph of
+`gitoxide` crates. Due to some blunders in the past the version on crates.io
+could not be installed anymore.
+This was eventually fixed with new minor releases across the ecosystem.
+
+Finally, yet another breaking change due to the introduction of the `git-hash`
+crate to break a dependency cycle between `git-object` and `git-features` caused
+yet another maintenance release.
+
 ### v0.4.1
 
 * fix installation via `cargo install`

tasks.md

@@ -4,8 +4,8 @@
   * [x] all docs, sans examples
   * [x] Rename pack data/pack index `Kind` to `Version` or similar, because that's what it really is.
 * **git-object** refactor     
-  * [ ] split `Id` and everything hash related into `git-id`
-  * [ ] use `git-id` inside of `git-features`, remove cycle
+  * [x] split `Id` and everything hash related into `git-id`
+  * [x] use `git-id` inside of `git-features`, remove cycle
 * **Documentation (with deny(missing_docs))**
   * [x] git-features
   * [ ] git-object