docs: function getVersion () {
    const url = 'https://raw.githubusercontent.com/mapbox/node-sqlite3/master/package.json'
    return new Promise((resolve, reject) => {
      https.get(url, res => {
        let data = ''
        res.setEncoding('utf8')
        if (res.statusCode !== 200) return reject(res.statusMessage)
        res.on('data', chunk => { data += chunk })
        res.on('end', () => resolve(JSON.parse(data).version))
      })
    })
  }