🚧 Tests for MemoryCache

Core/Cache/MemoryCache.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
+using SQLitePCL;
 
 namespace Kruzya.TelegramBot.Core.Cache
 {
@@ -47,9 +48,10 @@ namespace Kruzya.TelegramBot.Core.Cache
             _defaultTtl = defaultTtl;
         }
         
-        public bool TryGetValue(TKey key, ref TValue value)
+        public bool TryGetValue(TKey key, out TValue value)
         {
-            if (dict.ContainsKey(key))
+            value = default;
+            if (!dict.ContainsKey(key))
             {
                 return false;
             }