Function isDate

isDate(value): value is Date
Returns true if the given value is an instance of Date.
Parameters
- value: unknown
  The value to check
Returns value is Date
True if the given value is a date
Example
```
isDate(new Date())
//=> true
```
Example
```
// => true
isDate(new Date(NaN))
```
Example
```
// => false
isDate('2014-02-31')
```
Example
```
// => false
isDate({})
```
- Defined in src/is-date/index.ts:22