Added FastCache

https://github.com/jitbit/FastCache

README.md

@@ -276,6 +276,7 @@ To the extent possible under law, [Vitali Fokin](https://github.com/quozd) has w
 * [Akavache](https://github.com/reactiveui/Akavache) - An asynchronous, persistent key-value store
 * [EasyCaching](https://github.com/dotnetcore/EasyCaching) - A caching library that contains basic and some advanced usages of caching which can help handle caching more easier!
 * [CacheManager](https://github.com/MichaCo/CacheManager) - A common interface and abstraction layer for caching.
+* [FastCache](https://github.com/jitbit/FastCache) - 10X faster alternative to `MemoryCache` for .NET
 * [Foundatio](https://github.com/FoundatioFx/Foundatio#caching) - A common interface with in memory, Redis and hybrid implementations.
 * [Cashew](https://github.com/joakimskoog/Cashew) - a .NET library for caching responses easily with an `HttpClient` through an API that is simple and elegant yet powerful.
 * [Cache Tower](https://github.com/TurnerSoftware/CacheTower) - An efficient multi-layered caching system for .NET (In-Memory, Redis, Database, File etc)