"Could not find MIME for Buffer <null>" on loadFont with fnt file

# Expected Behavior
```js
Jimp.loadFont("path/to/fnt/file")
```
should load the font from a fnt file

# Current Behavior
Using jimp.loadFont throws an error about MIME

# Failure Information (for bugs)
Error:
```
Error: Could not find MIME for Buffer
at Jimp.parseBitmap (F:\WORKSPACE\image\node_modules\@jimp\core\dist\utils\image-bitmap.js:187:15)
at Jimp.parseBitmap (F:\WORKSPACE\image\node_modules\@jimp\core\dist\index.js:431:32)
at F:\WORKSPACE\image\node_modules\@jimp\core\dist\index.js:373:15
at FSReqCallback.readFileAfterClose [as oncomplete] (node:internal/fs/read_file_context:75:3)
```

I will provide other information if needed. the fnt file I used cannot be shared since it's generated out of a paid font.