Update for new combinator API

index.js

@@ -15,7 +15,7 @@ module.exports = function (rules) {
 		let keyRules = defaultValue(rules.key, []);
 		let valueRules = defaultValue(rules.value, []);
 		
-		return combinator((object, applyValidators) => {
+		let validator = combinator((object, applyValidators) => {
 			let newObject = {};
 			let allErrors = [];
 			
@@ -50,5 +50,9 @@ module.exports = function (rules) {
 				});
 			}
 		});
+
+		validator.callIfNull = false;
+
+		return validator;
 	}
 };