Can keep the aspect ratio unchanged ？

[citrusjunoss]

Issue

I'm a gentledev i:

• fully read the README recently
• searched for existing issues
• checked i'm up to date with the latest version of the project

Expected behavior

<!-- Generated by IcoMoon.io -->
<svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="1024" height="1024" viewBox="0 0 1024 1024">
<title></title>
<g id="icomoon-ignore">
</g>
<path fill="#000" d="M859.022 425.024l-347.022-306.196-347.022 306.196v472.278l264.419-3.762v-166.471c0-45.54 36.918-82.458 82.458-82.458s82.458 36.918 82.458 82.458v166.472l264.709 3.761v-472.278z"></path>
</svg>

Original svg ====== width / height 1 : 1

Converted font ====== width/height 1: 1

Actual behavior

Original svg ======= width / height 1 : 1

Converted font ======= width/height

I guess the actual aspect ratio is the aspect ratio of the path

Steps to reproduce the behavior

Debugging informations

Node 12.10
Gulp 4.0.2
Gulp-iconfont 10.0.3

Feature request

[pioug]

Please try v10.0.5