Upgrading from 5 to 8 - what changed? (Rectangular icons)
I was previously using this generator to generate a logo font (which is wide), mixed in with other regular icons like twitter/facebook/google etc. which are square.

Previously it was working just fine - the logo had the correct width and scaled accordingly when font-size is used.

With newer version, it is now fixed to the same width as every other icon, and made into a square. Which doesn't work obviously.

Any assistance would be helpful as I'm suddenly forced to upgrade this due to deprecated deps :( 

Edit: can confirm that this is also happening if there's only 1 svg. Attaching the SVG for analysis.
![listcorp](https://user-images.githubusercontent.com/1226920/221410714-e3daaf05-dab1-4975-8d51-26a416200648.svg)

Edit: works as expected on http://nfroidure.github.io/svgiconfont/

![Screen Shot 2023-02-26 at 11 44 22 pm](https://user-images.githubusercontent.com/1226920/221411212-20014f56-04e8-429f-b806-3126b278c131.jpg)
