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PHP extension updates

Change effective on 09 December 2020

The following PHP extensions have been updated:

ext-rdkafka version 4.1.1
ext-newrelic version 9.15.0.293

The ext-redis extension is now available for PHP 8.

The librdkafka library used by the ext-rdkafka extension has been updated to version 1.5.3.

Kafka on Heroku Supports TransactionalID JRuby 9.2.14.0 now available