added missing entries in changelog

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

Author: Serban Iorga

CHANGELOG.md

@@ -1,13 +1,23 @@
 # Changelog
 
-## [Unreleased]
+## [0.20.0]
+
+### Added
+
+- Added support for GICv2.
 
 ### Fixed
 
 - Fixed #1283 - Can't start a VM in AARCH64 with vcpus number more than 16.
 - The backtrace are printed on `panic`, no longer causing a seccomp fault.
 - Fixed #1375 - Change logger options type from Value to Vec<LogOption> to
   prevent potential unwrap on None panics.
+- 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]