Change selectedColor property to strong to remove warning when compiling with non-arc code

ColorPicker/ColorPicker.framework/Versions/A/Headers/CPKPopover.h

@@ -9,7 +9,7 @@
 @interface CPKPopover : NSPopover
 /** Reflects the final selected color. Setter changes color in open popover. */
-@property(nonatomic) NSColor *selectedColor;
+@property(nonatomic, strong) NSColor *selectedColor;
 /** Called before popover closes. */
 @property(nonatomic, copy) void (^willClose)();

ColorPicker/ColorPicker/CPKPopover.h

@@ -9,7 +9,7 @@
 @interface CPKPopover : NSPopover
 /** Reflects the final selected color. Setter changes color in open popover. */
-@property(nonatomic) NSColor *selectedColor;
+@property(nonatomic, strong) NSColor *selectedColor;
 /** Called before popover closes. */
 @property(nonatomic, copy) void (^willClose)();