Update all the files in the Details group

AsyncDisplayKit/Details/ASIndexPath.h

@@ -19,8 +19,11 @@ typedef struct {
   ASIndexPath end;
 } ASIndexPathRange;
 
+NS_ASSUME_NONNULL_BEGIN
+
 ASDISPLAYNODE_EXTERN_C_BEGIN
 
+
 extern ASIndexPath ASIndexPathMake(NSInteger section, NSInteger row);
 
 extern BOOL ASIndexPathEqualToIndexPath(ASIndexPath first, ASIndexPath second);
@@ -41,3 +44,5 @@ ASDISPLAYNODE_EXTERN_C_END
 - (ASIndexPath)ASIndexPathValue;
 
 @end
+
+NS_ASSUME_NONNULL_END