fix(trim): clear IL2087 and IL2073 so the 7.3.2 NativeAOT build passes

src/ExcelReader.Core/Parser/SyncRowEnumerator.cs

@@ -45,21 +45,14 @@ private protected SyncRowEnumerator(TRows rows)
 
         object? IEnumerator.Current => typeof(T).IsByRefLike ? throw new NotSupportedException() : Box(Project());
 
-        private sealed class RawData
-        {
-            public byte Data;
-        }
-
         // T allows ref struct, so the language refuses (object)value; the byref-like case is excluded by the caller.
         private static object? Box(T value)
         {
             if (!typeof(T).IsValueType)
             {
                 return Unsafe.As<T, object>(ref value);
             }
-            object box = RuntimeHelpers.GetUninitializedObject(typeof(T));
-            Unsafe.As<byte, T>(ref Unsafe.As<RawData>(box).Data) = value;
-            return box;
+            return RuntimeHelpers.Box(ref Unsafe.As<T, byte>(ref value), typeof(T).TypeHandle);
         }
 
         /// <inheritdoc/>

src/ExcelReader.Core/Reader/SheetDataReader.cs

@@ -208,6 +208,7 @@ public Type GetFieldType(int i)
             return TypeOf(CurrentCell(i));
         }
 
+        [return: DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicFields | DynamicallyAccessedMemberTypes.PublicProperties)]
         private static Type TypeOf(Cell cell)
         {
             return cell.Type switch