Upgrade Lombok to 1.18.20 (#10259)
Upgrade Lombok to 1.18.20 (#10259)

- see https://projectlombok.org/changelog
- Fixes compilation on JDK 16
yahoo/pulsar,yahoo/pulsar,merlimat/pulsar,massakam/pulsar,massakam/pulsar,massakam/pulsar,yahoo/pulsar,yahoo/pulsar,massakam/pulsar,massakam/pulsar,yahoo/pulsar,yahoo/pulsar,merlimat/pulsar,merlimat/pulsar,merlimat/pulsar,merlimat/pulsar,massakam/pulsar,merlimat/pulsar