UIView+FDCollapsibleConstraints problem when use XXNibBridge(2.3.0)

[dev-gao]

In XXNibBridge 2.3.0 version, create new constraints for the realView at instantiateRealViewFromPlaceholder(). It doesn't invoke setFd_collapsibleConstraints for updating collapsible constraints.
So the view's collapse action goes wrong because of the realView was not setFd_collapsibleConstraints.

[wtlucky]

Add the several lines after the line in XXNibBridge.m

[realView addConstraint:newConstraint];

//************* This section works for UIView+FDCollapsibleConstraints
        NSMutableArray *constraints = objc_getAssociatedObject(realView, @selector(fd_collapsibleConstraints));
        if (!constraints) {
            constraints = @[].mutableCopy;
            objc_setAssociatedObject(realView, @selector(fd_collapsibleConstraints), constraints, OBJC_ASSOCIATION_RETAIN);
        }
        // Store original constant value
        objc_setAssociatedObject(newConstraint, @selector(fd_originalConstant), @(constraint.constant), OBJC_ASSOCIATION_RETAIN);
        [constraints addObject:newConstraint];