text: import React from 'react'
  import Link from 'gatsby-link'
  import PropTypes from 'prop-types'
  const Header = ({ className, title }) => {
    return (
      <header className={className}>
        <Link to="/">
          <h1>{title}</h1>
        </Link>
      </header>
    )
  }
  
  Header.propTypes = {
    className: PropTypes.string,
    title: PropTypes.string.isRequired,
  }
  
  export default Header
  