title: how to add attribution in svg file?
body: <p>i have an icon which i downloaded from svgrepo.com for an open source project and the icon( i.e svg) is licensed under <a href="https://creativecommons.org/licenses/by/4.0/" rel="nofollow noreferrer">https://creativecommons.org/licenses/by/4.0/</a>. so i have to add attribution.
  i found there are many ways like adding  tag to the website of license etc.
  but the thing is that i don't want any visual attribution. so how to add attribution in such a way that i only add attribution in svg file which will be not visual?</p>