code: function renderPageMeta (meta) {
    if (!meta) return ''
    return meta.map(m => {
      let res = `<meta`
      Object.keys(m).forEach(key => {
        res += ` ${key}="${escape(m[key])}"`
      })
      return res + `>`
    }).join('')
  }
docs: Render meta tags
  
  @param {Array} meta
  @returns {Array<string>}