Function isPrimitive

isPrimitive(object: any): boolean
Returns whether the given object is primitive
Parameters
- object: any
  the object to check
Returns boolean
whether the given object is primitive
Author
David Hsing
Example
```
isPrimitive(undefined);    // true
isPrimitive(true);    // true
isPrimitive('foobar');    // true
isPrimitive({foo: 'bar'});    // false
```