add BitFaster.Caching (quozd#1224)

Co-authored-by: Alex Peck <[email protected]>

README.md

@@ -267,6 +267,7 @@ To the extent possible under law, [Vitali Fokin](https://github.com/quozd) has w
 * [Cache Tower](https://github.com/TurnerSoftware/CacheTower) - An efficient multi-layered caching system for .NET (In-Memory, Redis, Database, File etc)
 * [FusionCache](https://github.com/jodydonetti/ZiggyCreatures.FusionCache) - An easy to use, high performance and robust cache with an optional distributed 2nd layer and some advanced features, like a fail-safe mechanism and advanced timeouts management
 * [LazyCache](https://github.com/alastairtree/LazyCache) - A simple, developer friendly, in-memory thread-safe caching service. It leverages Microsoft.Extensions.Caching and Lazy to provide performance and reliability in heavy load scenarios.
+* [BitFaster.Caching](https://github.com/bitfaster/BitFaster.Caching) - Thread-safe in-memory caches optimized for very high concurrent throughput, near optimal hit rate and low latency.   
 
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