Should correct handle names of built-in Object properties

[ikokostya]

var router = require('rou')();

router.when('/').then(function(){});

router.route({
    path: '/',
    query: {hasOwnProperty: 1}
});

$ node test.js 

/home/kostya/node_modules/rou/lib/rule.js:86
                queryParams.hasOwnProperty(j) && (res[j] = queryParams[j]);
                            ^
TypeError: Property 'hasOwnProperty' of object #<Object> is not a function
    at Object.Rule._mergeParams (/home/kostya/node_modules/rou/lib/rule.js:86:29)
    at Object.Rule._match (/home/kostya/node_modules/rou/lib/rule.js:64:26)
    at Object.Router._doRouting (/home/kostya/node_modules/rou/lib/router.js:75:40)
    at Object.Router.route (/home/kostya/node_modules/rou/lib/router.js:47:44)
    at Object.<anonymous> (/home/kostya/test/test.js:5:8)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)