customInspect method should take options argument.

[NodeGuy]

util.inspect calls custom inspect methods on objects. This is great. It doesn't pass its options argument to the custom method, which is not great.

As a result, e.g., the options showHidden and colors aren't applied recursively to objects with custom inspect methods.

Current behavior:

> var parent = {child: {'visible': "I am visible."}};
> Object.defineProperty(parent.child, 'hidden', {value: "I am hidden."});
> parent.inspect = function (options) { return "Here's my child: " + util.inspect(this.child, options); };
> util.inspect(parent, {showHidden: true});
'Here\'s my child: { visible: \'I am visible.\' }'

Desired behavior:

> util.inspect(parent, {showHidden: true});
'Here\'s my child: { visible: \'I am visible.\', [hidden]: \'I am hidden.\' }'