Update changelog

Author: matthiasnoback

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Changelog
 
+## v0.8.0
+
+- Fixed a bug in `DefinitionHasTagConstraint`: it didn't throw an exception when a tag was missing, which resulted in
+  false positives. Reported and fixed by Christian Flothmann (@xabbuh).
+
+## v0.7.0
+
+- Add `assertContainerBuilderNotHasService()`, contributed by Uwe Jäger (@uwej711).
+
+## v0.6.0
+
+- Fix AbstractCompilerPassTestCase when using strict-mode, contributed by Sebastiaan Stok (@sstok).
+
 ## v0.5.0
 
 - Automatically resolve a definition's class before comparing it to the expected class (in