Update CHANGELOG for v2.

Author: kstich

CHANGELOG.md

@@ -1,13 +1,18 @@
 # CHANGELOG
 
+## 2.0.0 - 2018-01-18
+
+* Added support for Symfony ~4.0
+* Updated package type for Symfony Flex support.
+
 ## 1.3.0 - 2017-07-12
 
 * Added support for Symfony ~3.0.
 * Fixed deprecation warnings being thrown on Symfony >= 2.6.
 
 ## 1.0.2 - 2015-09-05
 
-* Removed usage of `setFactory` method to ensure compatiable with 
+* Removed usage of `setFactory` method to ensure compatibility with 
   `symfony/dependency-injection` ~2.3
 
 ## 1.0.1 - 2015-08-11