Add details on supported libraries. Fixes #57.

Author: ioquatix

readme.md

@@ -4,6 +4,10 @@ An asynchronous client for Redis including TLS. Support for streaming requests a
 
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+## Support
+
+This gem supports both Valkey and Redis. It is designed to be compatible with the latest versions of both libraries. We also test Redis sentinel and cluster configurations.
+
 ## Usage
 
 Please see the [project documentation](https://socketry.github.io/async-redis/) for more details.