`mkdir` error if filename containt space(s)

[xerc]

ver. 5.0.0

glyphhanger/src/GlyphHangerFontFace.js

Line 84 in 6b27380

fs.mkdirSync(dir, { recursive: true });

zsh@osx

$ glyphhanger --subset="New Font.ttf" --formats=woff,woff2,woff-zopfli --json --css
$ glyphhanger --subset=New\ Font.ttf --formats=woff,woff2,woff-zopfli --json --css

Writing CSS file: New Font.css
GlyphHangerFontFace Error:  Error: ENOENT: no such file or directory, mkdir
    at Object.mkdirSync (node:fs:1389:3)
    at GlyphHangerFontFace.writeCSSFiles (/usr/local/lib/node_modules/glyphhanger/src/GlyphHangerFontFace.js:84:7)
    at /usr/local/lib/node_modules/glyphhanger/cmd.js:143:14 {
  errno: -2,
  syscall: 'mkdir',
  code: 'ENOENT'