text: import PropTypes from 'prop-types'
  import React from 'react'
  import Navigation from './navigation'
  
  const Header = ({ siteTitle }) => (
    <header className="header">
        <Navigation></Navigation>
    </header>
  )
  
  Header.propTypes = {
    siteTitle: PropTypes.string,
  }
  
  Header.defaultProps = {
    siteTitle: ``,
  }
  
  export default Header
  