update changelog

add 0.22.0 notes

Added 0.20.1 release note

Added 0.20.0 release note

Fixed BinaryLogClientGTIDIntegrationTest: Received 4 QUERY event(s) i…

…nstead of expected 2

Added 0.19.0 release notes

Bumped mysql-binlog-connector-java version to 0.18.0 (README)

Bumped mysql-binlog-connector-java version to 0.17.0 (README)

Added 0.16.1 release note

Added 0.16.0 release note