added missing entries in changelog

Signed-off-by: Serban Iorga <[email protected]>

Author: Serban Iorga

CHANGELOG.md

@@ -1,6 +1,10 @@
 # Changelog
 
-## [Unreleased]
+## [0.20.0]
+
+### Added
+
+- Added support for GICv2.
 
 ### Fixed
 
@@ -15,6 +19,12 @@
   by the ratelimiter - Github issue #1439
 - Invalid fields in rate limiter related API requests are now failing with
   a proper error message.
+- Fixed #1316 - fix the size of a virtio device, backed by a block device.
+- Log failed api requests.
+
+### Changed
+
+- Decreased release binary size by 10%.
 
 ## [0.19.0]