Filenames which have multibyte characters in them cause corrupt asar files

[DanielDignam]

Simple example, creates a directory with one file in it which has a mulitbyte character filename. The pack apparently works, but list gives an error, and unpack fails silently

mkdir g
echo a >  g\女の子.txt
node ..\node_modules\asar\bin\asar  pack g t.asar
node ..\node_modules\asar\bin\asar  list t.asar
undefined:1
{"files":{"女の子.txt":{"size":8,"offset":
                                       ^
SyntaxError: Unexpected end of input
    at Object.parse (native)
    at Object.module.exports.readArchiveHeaderSync (C:\repos\eagle-print\desktop\node_modules\asar\lib\disk.js:97:20)
    at Object.module.exports.readFilesystemSync (C:\repos\eagle-print\desktop\node_modules\asar\lib\disk.js:105:21)
    at Object.module.exports.listPackage (C:\repos\eagle-print\desktop\node_modules\asar\lib\asar.js:141:17)
    at Command.<anonymous> (C:\repos\eagle-print\desktop\node_modules\asar\bin\asar:42:23)
    at Command.listener (C:\repos\eagle-print\desktop\node_modules\asar\node_modules\commander\index.js:249:8)
    at emitTwo (events.js:87:13)
    at Command.emit (events.js:172:7)
    at Command.parseArgs (C:\repos\eagle-print\desktop\node_modules\asar\node_modules\commander\index.js:480:12)
    at Command.parse (C:\repos\eagle-print\desktop\node_modules\asar\node_modules\commander\index.js:372:21)