test if a value is a javascript primitive type
npm install is-really-primitivetest if a value is primitive
> it's useless so it's awesome
``javascript
const isPrimitive = require('is-fully-primitive')
// booleans are primitive
isPrimitive(true) // true
isPrimitive(false) // true
isPrimitive(Boolean(false)) // true
// strings are primitive
isPrimitive('foo') // true
isPrimitive(String('bar')) // true
// numbers are primitive
isPrimitive(42) // true
isPrimitive(4.2) // true
isPrimitive(Number(42)) // true
// symbols are primitive
isPrimitive(Symbol('baz')) // true
// null is primitive
isPrimitive(null) // true
// undefined is primitive
isPrimitive(undefined) // true
// others are not primitive
isPrimitive(new Date()) // false
isPrimitive(new isPrimitive()) // false
``