Make memory singleton

Author: AndMu

src/Sentiment/Wikiled.Sentiment.Analysis/Containers/SentimentMainModule.cs

@@ -41,7 +41,7 @@ public IServiceCollection ConfigureServices(IServiceCollection services)
             services.AddSingleton<ISentenceRepairHandler, SentenceRepairHandler>();
             services.AddSingleton<IExtendedWords, ExtendedWords>();
 
-            services.AddScoped<IMemoryCache>(c => new MemoryCache(new MemoryCacheOptions()));
+            services.AddSingleton<IMemoryCache>(c => new MemoryCache(new MemoryCacheOptions()));
 
             services.AddTransient<IWordFactory, WordOccurenceFactory>();