Added changelog for new versions (#186)

I prepared changelog for new versions. @Nyholm

---------

Co-authored-by: Tobias Nyholm <tobias.nyholm@gmail.com>

Author: thecaliskan

CHANGELOG.md

@@ -1,9 +1,10 @@
 # Change Log
 
-## [NOT RELEASED]
+## 1.0.0
 
 ### Added
 
+- Add support for Symfony 8
 - Add support for Symfony 7
 
 ### 0.1.1