function normalizeFiles (files) {
  const streams = []

  for (const file of files) {
    streams.push({
      path: file.filepath || file.webkitRelativePath || file.name,
      content: file,
      size: file.size
    })
  }

  return streams
}
@typedef {Object} FileExt
@property {string} [filepath]
@property {string} [webkitRelativePath]

@typedef {FileExt &  File} ExtendedFile

@typedef {Object} FileStream
@property {string} path
@property {Blob} content
@property {number} size

@param {ExtendedFile[]} files
@returns {FileStream[]}