update changelog

Signed-off-by: Miguel Molina <[email protected]>

Author: erizocosmico

CHANGELOG.md

@@ -7,7 +7,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
-- Move to go modules and upgrade bblfsh client version.
+- Moved to Go modules.
+- Add COMMIT_STATS function
+- sql: implement EXPLODE and generators ([#720](https://github.com/src-d/go-mysql-server/pull/720))
+
+### Changed
+- Upgrade vitess to v1.8.0 ([#738](https://github.com/src-d/go-mysql-server/pull/738))
+- Upgrade bblfsh to v4.1.0.
+- Upgrade gocloc to latest master 764f3f6ae21e.
+
+### Fixed
+- Fix parsing of quoted identifiers in SHOW CREATE TABLE queries ([#737](https://github.com/src-d/go-mysql-server/pull/737))
+-  sql/analyzer: back-propagate expression names after adding convert ([#739](https://github.com/src-d/go-mysql-server/pull/739))
+- sql/expression: allow null literals in case branches ([#741](https://github.com/src-d/go-mysql-server/pull/741))
+- sql/plan: make LEFT and RIGHT join work as expected ([#743](https://github.com/src-d/go-mysql-server/pull/743))
+
 
 ## [0.20.0] - 2019-05-30
 ### Known Issues