CSS generation is overwritten on several instances
I created a node script (ts-node) to play the generations of several distinct font-icons.

svgtofont.ts :
```typescript
import fs from 'fs';
import path from 'path';
import svgtofont from 'svgtofont';
import type { CSSOptions } from 'svgtofont/lib/utils';

import svgoConfig from '../conf/svgo.config';

const iconsFolder = path.join(__dirname, '../www/src/icons');

const camalize = (str: string) =>
  str.toLowerCase().replace(/[^a-zA-Z0-9]+(.)/g, (m, chr) => chr.toUpperCase());

const cssOptions = (fileName: string): CSSOptions => ({
  cssPath: '../../fonticon/',
  fileName: `_${camalize(fileName)}`,
  fontSize: '1rem',
  output: 'www/src/scss/fonticon'
});

fs.readdir(iconsFolder, (err, files) => {
  files.forEach(async fileName => {
    if (fileName) {
      await svgtofont({
        css: cssOptions(fileName),
        dist: path.join(__dirname, '../www/src/fonticon'), // output path
        fontName: fileName,
        log: true,
        src: path.join(__dirname, `../www/src/icons/${fileName}`), // svg path
        svgoOptions: svgoConfig
      });

      console.log(`font icon "${fileName}" is generated!`);
    }
  });
});
```

My fonts are well created as well as the CSS files, if I have only one directory everything is fine.

Now, if I add a second directory, all CSS files get the code of the last generated batch.

The CSS file of the first font retrieves my files but declares the CSS classes of the 2nd batch.

The first generated CSS file:
❎ www/src/scss/fonticon/_adminFonticon.scss:
```scss
@font-face {font-family: "admin-fonticon";
  src: url('../../fonticon/admin-fonticon.eot?t=1683226649160'); /* IE9*/
  src: url('../../fonticon/admin-fonticon.eot?t=1683226649160#iefix') format('embedded-opentype'), /* IE6-IE8 */
  url("../../fonticon/admin-fonticon.woff2?t=1683226649160") format("woff2"),
  url("../../fonticon/admin-fonticon.woff?t=1683226649160") format("woff"),
  url('../../fonticon/admin-fonticon.ttf?t=1683226649160') format('truetype'), /* chrome, firefox, opera, Safari, Android, iOS 4.2+*/
  url('../../fonticon/admin-fonticon.svg?t=1683226649160#admin-fonticon') format('svg'); /* iOS 4.1- */
}

[class^="admin-fonticon-"], [class*=" admin-fonticon-"] {
  font-family: 'admin-fonticon' !important;
  font-size: 1rem;
  font-style:normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.admin-fonticon-discord:before { content: "\ea01"; }
.admin-fonticon-facebook:before { content: "\ea02"; }
.admin-fonticon-frame:before { content: "\ea03"; }
.admin-fonticon-giphy:before { content: "\ea04"; }
.admin-fonticon-instagram:before { content: "\ea05"; }
.admin-fonticon-linkedin:before { content: "\ea06"; }
.admin-fonticon-menu:before { content: "\ea07"; }
.admin-fonticon-patreon:before { content: "\ea08"; }
.admin-fonticon-soundcloud:before { content: "\ea09"; }
.admin-fonticon-tiktok:before { content: "\ea0a"; }
.admin-fonticon-tipeee:before { content: "\ea0b"; }
.admin-fonticon-twitch:before { content: "\ea0c"; }
.admin-fonticon-twitter:before { content: "\ea0d"; }
.admin-fonticon-utip:before { content: "\ea0e"; }
.admin-fonticon-youtube:before { content: "\ea0f"; }

$admin-fonticon-discord: "\ea01";
$admin-fonticon-facebook: "\ea02";
$admin-fonticon-frame: "\ea03";
$admin-fonticon-giphy: "\ea04";
$admin-fonticon-instagram: "\ea05";
$admin-fonticon-linkedin: "\ea06";
$admin-fonticon-menu: "\ea07";
$admin-fonticon-patreon: "\ea08";
$admin-fonticon-soundcloud: "\ea09";
$admin-fonticon-tiktok: "\ea0a";
$admin-fonticon-tipeee: "\ea0b";
$admin-fonticon-twitch: "\ea0c";
$admin-fonticon-twitter: "\ea0d";
$admin-fonticon-utip: "\ea0e";
$admin-fonticon-youtube: "\ea0f";
```

✅ INSTEAD OF
```scss
@font-face {font-family: "admin-fonticon";
  src: url('../../fonticon/admin-fonticon.eot?t=1683226887843'); /* IE9*/
  src: url('../../fonticon/admin-fonticon.eot?t=1683226887843#iefix') format('embedded-opentype'), /* IE6-IE8 */
  url("../../fonticon/admin-fonticon.woff2?t=1683226887843") format("woff2"),
  url("../../fonticon/admin-fonticon.woff?t=1683226887843") format("woff"),
  url('../../fonticon/admin-fonticon.ttf?t=1683226887843') format('truetype'), /* chrome, firefox, opera, Safari, Android, iOS 4.2+*/
  url('../../fonticon/admin-fonticon.svg?t=1683226887843#admin-fonticon') format('svg'); /* iOS 4.1- */
}

[class^="admin-fonticon-"], [class*=" admin-fonticon-"] {
  font-family: 'admin-fonticon' !important;
  font-size: 1rem;
  font-style:normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.admin-fonticon-add:before { content: "\ea01"; }
.admin-fonticon-cancel:before { content: "\ea02"; }
.admin-fonticon-check:before { content: "\ea03"; }
.admin-fonticon-close:before { content: "\ea04"; }
.admin-fonticon-composite:before { content: "\ea05"; }
.admin-fonticon-edit:before { content: "\ea06"; }
.admin-fonticon-embed:before { content: "\ea07"; }
.admin-fonticon-lock:before { content: "\ea08"; }
.admin-fonticon-logout:before { content: "\ea09"; }
.admin-fonticon-paragraph:before { content: "\ea0a"; }
.admin-fonticon-picture:before { content: "\ea0b"; }
.admin-fonticon-slideshow:before { content: "\ea0c"; }
.admin-fonticon-sound:before { content: "\ea0d"; }
.admin-fonticon-submit:before { content: "\ea0e"; }
.admin-fonticon-trash:before { content: "\ea0f"; }
.admin-fonticon-unlock:before { content: "\ea10"; }
.admin-fonticon-upload-image:before { content: "\ea11"; }
.admin-fonticon-video:before { content: "\ea12"; }

$admin-fonticon-add: "\ea01";
$admin-fonticon-cancel: "\ea02";
$admin-fonticon-check: "\ea03";
$admin-fonticon-close: "\ea04";
$admin-fonticon-composite: "\ea05";
$admin-fonticon-edit: "\ea06";
$admin-fonticon-embed: "\ea07";
$admin-fonticon-lock: "\ea08";
$admin-fonticon-logout: "\ea09";
$admin-fonticon-paragraph: "\ea0a";
$admin-fonticon-picture: "\ea0b";
$admin-fonticon-slideshow: "\ea0c";
$admin-fonticon-sound: "\ea0d";
$admin-fonticon-submit: "\ea0e";
$admin-fonticon-trash: "\ea0f";
$admin-fonticon-unlock: "\ea10";
$admin-fonticon-upload-image: "\ea11";
$admin-fonticon-video: "\ea12";
```

and the second generated CSS file
✅ www/src/scss/fonticon/_fonticon.scss:
```scss
@font-face {font-family: "fonticon";
  src: url('../../fonticon/fonticon.eot?t=1683226649161'); /* IE9*/
  src: url('../../fonticon/fonticon.eot?t=1683226649161#iefix') format('embedded-opentype'), /* IE6-IE8 */
  url("../../fonticon/fonticon.woff2?t=1683226649161") format("woff2"),
  url("../../fonticon/fonticon.woff?t=1683226649161") format("woff"),
  url('../../fonticon/fonticon.ttf?t=1683226649161') format('truetype'), /* chrome, firefox, opera, Safari, Android, iOS 4.2+*/
  url('../../fonticon/fonticon.svg?t=1683226649161#fonticon') format('svg'); /* iOS 4.1- */
}

[class^="fonticon-"], [class*=" fonticon-"] {
  font-family: 'fonticon' !important;
  font-size: 1rem;
  font-style:normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.fonticon-discord:before { content: "\ea01"; }
.fonticon-facebook:before { content: "\ea02"; }
.fonticon-frame:before { content: "\ea03"; }
.fonticon-giphy:before { content: "\ea04"; }
.fonticon-instagram:before { content: "\ea05"; }
.fonticon-linkedin:before { content: "\ea06"; }
.fonticon-menu:before { content: "\ea07"; }
.fonticon-patreon:before { content: "\ea08"; }
.fonticon-soundcloud:before { content: "\ea09"; }
.fonticon-tiktok:before { content: "\ea0a"; }
.fonticon-tipeee:before { content: "\ea0b"; }
.fonticon-twitch:before { content: "\ea0c"; }
.fonticon-twitter:before { content: "\ea0d"; }
.fonticon-utip:before { content: "\ea0e"; }
.fonticon-youtube:before { content: "\ea0f"; }

$fonticon-discord: "\ea01";
$fonticon-facebook: "\ea02";
$fonticon-frame: "\ea03";
$fonticon-giphy: "\ea04";
$fonticon-instagram: "\ea05";
$fonticon-linkedin: "\ea06";
$fonticon-menu: "\ea07";
$fonticon-patreon: "\ea08";
$fonticon-soundcloud: "\ea09";
$fonticon-tiktok: "\ea0a";
$fonticon-tipeee: "\ea0b";
$fonticon-twitch: "\ea0c";
$fonticon-twitter: "\ea0d";
$fonticon-utip: "\ea0e";
$fonticon-youtube: "\ea0f";
```