Change `obj.hasOwnProperty` to `Object.hasOwn` or `Object.prototype.hasOwnPerperty.call`

v0.7.1

https://github.com/jshttp/cookie/blob/v0.7.1/index.js#L133

Here is an example where this is problematic.

```javascript
require('cookie').parse('hasOwnProperty=str;xx=xx')
// Uncaught TypeError: obj.hasOwnProperty is not a function
```

This should not be the intended behavior.

