remove unuse isa from model2keyvalues

Author: CoderMJLee

MJExtensionExample/MJExtensionExample.xcodeproj/project.xcworkspace/xcuserdata/mj.xcuserdatad/UserInterfaceState.xcuserstate

@@ -15,7 +15,7 @@ @implementation MJFoundation
 
 + (void)initialize
 {
-    _foundationClasses = @[@"NSNumber",@"NSArray",@"NSMutableArray",@"NSData",@"NSMutableData",@"NSDate",@"NSDictionary",@"NSMutableDictionary",@"NSString",@"NSMutableString"];
+    _foundationClasses = @[@"NSObject", @"NSNumber",@"NSArray",@"NSMutableArray",@"NSData",@"NSMutableData",@"NSDate",@"NSDictionary",@"NSMutableDictionary",@"NSString",@"NSMutableString"];
 }
 
 + (BOOL)isClassFromFoundation:(Class)c