Fixed import

Author: niemyjski

test/Exceptionless.Tests/Log/IsolatedStorageFileExceptionlessLogTests.cs

@@ -1,5 +1,6 @@
 #if NET45
 using System;
+using System.Threading.Tasks;
 using Exceptionless.Dependency;
 using Exceptionless.Logging;
 using Exceptionless.Serializer;