Date instance
date/is
Confirms if given object is a native date, and is not an Invalid Date
```javascript const isDate = require("type/date/is");
isDate(new Date()); // true isDate(new Date("Invalid date")); // false isDate(Date.now()); // false isDate("foo"); // false ```
date/ensure
If given argument is a date object, it is returned back. Otherwise TypeError
is thrown.
```javascript const ensureDate = require("type/date/ensure");
const date = new Date(); ensureDate(date); // date ensureDate(123123); // Thrown TypeError: 123123 is not a date object ```