async function isFileContentBinary (fsInstance, filepath) {
  return new Promise((resolve, reject) => {
    const rs = fsInstance.createReadStream(filepath, {start: 0, end: 512})
    rs.on('error', reject)
    rs.pipe(concat(buf => resolve(isBinaryCheck(buf))))
  })
}
Guesses if the file is binary based on its content.
@param {Object} fsInstance - The filesystem to read from.
@param {string} filepath
@returns {Promise<boolean>}