Update changelog

Author: marmichalski

CHANGELOG.md

@@ -12,7 +12,12 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
  * **Fixed** for any bug fixes.
  * **Security** in case of vulnerabilities.
 
+## [0.7.3] 2020-07-13
+### Added
+ * Add support for non-singleton services (definitions) (#30)
+
 ## [0.7.2] 2020-05-01
+### Changed
  * Replace YiiDynamicStaticMethodReturnTypeExtension with a stub
 
 ## [0.7.1] 2019-12-16