FileSystemProvider (FTP) wrongly returns size as string and not number

[bpasero]

Heads up, found this while looking into microsoft/vscode#72909. The FTP provider seems to return FileStat where size is of type string but not number.

[gjsjohnmurray]

@liximomo I think the fix needs to go here (code pointer)

Insert this clause (or similar):

    if (typeof target.size === 'string') {
      target.size = +target.size;
    }

[liximomo]

Nice catch.

[liximomo]

Fixed.