Changed the configuration section GetInterceptors to a read only dictionary

Author: johelvisguzman

src/DotNetToolkit.Repository/Internal/ConfigFile/ConfigurationSection.cs

@@ -74,7 +74,7 @@ public ICacheProvider GetCachingProvider()
             return CachingProvider.GetTypedValue();
         }
 
-        public Dictionary<Type, Func<IRepositoryInterceptor>> GetInterceptors()
+        public IReadOnlyDictionary<Type, Func<IRepositoryInterceptor>> GetInterceptors()
         {
             return Interceptors.GetTypedValues();
         }

src/DotNetToolkit.Repository/Internal/ConfigFile/IConfigurationSection.cs

@@ -18,6 +18,6 @@ internal interface IConfigurationSection
 
         ICacheProvider GetCachingProvider();
 
-        Dictionary<Type, Func<IRepositoryInterceptor>> GetInterceptors();
+        IReadOnlyDictionary<Type, Func<IRepositoryInterceptor>> GetInterceptors();
     }
 }

src/DotNetToolkit.Repository/Internal/ConfigFile/Json/ConfigurationSection.cs

@@ -84,7 +84,7 @@ public ICacheProvider GetCachingProvider()
             return null;
         }
 
-        public Dictionary<Type, Func<IRepositoryInterceptor>> GetInterceptors()
+        public IReadOnlyDictionary<Type, Func<IRepositoryInterceptor>> GetInterceptors()
         {
             var interceptorsDict = new Dictionary<Type, Func<IRepositoryInterceptor>>();
             var section = _root.GetSection(InterceptorCollectionSectionKey);