Include ZSTD in the supported compression algorithms

See tulios#873

README.md

@@ -45,7 +45,7 @@ KafkaJS is a modern [Apache Kafka](https://kafka.apache.org/) client for Node.js
 * Transactional support for producers and consumers
 * Message headers
 * GZIP compression
-  * Snappy and LZ4 compression through pluggable codecs
+  * Snappy, LZ4 and ZSTD compression through pluggable codecs
 * Plain, SSL and SASL_SSL implementations
 * Support for SCRAM-SHA-256 and SCRAM-SHA-512
 * Support for AWS IAM authentication
@@ -146,4 +146,4 @@ See [LICENSE](https://github.com/tulios/kafkajs/blob/master/LICENSE) for more de
 * Thanks to [Sebastian Norde](https://github.com/sebastiannorde) for the V1 logo ❤️
 * Thanks to [Tracy (Tan Yun)](https://medium.com/@tanyuntracy) for the V2 logo ❤️
 
-<small>Apache Kafka and Kafka are either registered trademarks or trademarks of The Apache Software Foundation in the United States and other countries. KafkaJS has no affiliation with the Apache Software Foundation.</small>
+<small>Apache Kafka and Kafka are either registered trademarks or trademarks of The Apache Software Foundation in the United States and other countries. KafkaJS has no affiliation with the Apache Software Foundation.</small>