License not recognized by go-licenses
Hello!

When using [`go-licenses`](https://github.com/google/go-licenses) to check the license of this repository it fails with:

```
E0531 10:41:55.214623   34183 library.go:122] Failed to find license for github.com/ajstarks/svgo: cannot find a known open source license for "/home/hug-dev/go/pkg/mod/github.com/ajstarks/svgo@v0.0.0-20211024235047-1546f124cd8b" whose name matches regexp ^(?i)((UN)?LICEN(S|C)E|COPYING|README|NOTICE).*$ and locates up until "/home/hug-dev/go/pkg/mod/github.com/ajstarks/svgo@v0.0.0-20211024235047-1546f124cd8b"
Unknown license type  found for library github.com/ajstarks/svgo
```