Make It.IsAny, It.IsNotNull work for COM types

Testing a COM object's type using `IsAssignableFrom` can report false
negatives. .NET might only see the generic RCW type `__ComObject` in-
stead of the COM interface type. The `is` operator on the other hand
appears to be performing `QueryInterface` for COM objects to get the
right result.

Since `is` and `Type.IsAssignableFrom` work somewhat differently (see
https://stackoverflow.com/q/44368313/240733), the previous type check
is left in place for all objects *except* COM objects; for those, the
`is`-based check is used instead. This distinction should reduce the
likelihood of introducing a breaking change.

Source/It.cs

@@ -45,6 +45,9 @@
 using System.Text.RegularExpressions;
 using System.Diagnostics.CodeAnalysis;
 using System.Reflection;
+#if !NETCORE
+using static System.Runtime.InteropServices.Marshal;
+#endif
 
 namespace Moq
 {
@@ -55,15 +58,25 @@ public static class It
 		public static TValue IsAny<TValue>()
 		{
 			return Match<TValue>.Create(
+#if !NETCORE
+				value => value == null || (IsComObject(value) ? value is TValue
+				                                              : typeof(TValue).IsAssignableFrom(value.GetType())),
+#else
 				value => value == null || typeof(TValue).IsAssignableFrom(value.GetType()),
+#endif
 				() => It.IsAny<TValue>());
 		}
 
 		/// <include file='It.xdoc' path='docs/doc[@for="It.IsNotNull"]/*'/>
 		public static TValue IsNotNull<TValue>()
 		{
 			return Match<TValue>.Create(
+#if !NETCORE
+				value => value != null && (IsComObject(value) ? value is TValue
+				                                              : typeof(TValue).IsAssignableFrom(value.GetType())),
+#else
 				value => value != null && typeof(TValue).IsAssignableFrom(value.GetType()),
+#endif
 				() => It.IsNotNull<TValue>());
 		}