Update to Flink 1.20 and Pulsar 3.0.2 with callbacks#102

JohnBattista wants to merge 5 commits intoapache:mainapache/flink-connector-pulsar:mainfrom

attentive-mobile:attn/5_0/flink-1_20-pulsar-3_0_2attentive-mobile/flink-connector-pulsar:attn/5_0/flink-1_20-pulsar-3_0_2Copy head branch name to clipboard